Archaeologists find 5,500-year-old plaza in Peru

By Marco Aquino

LIMA (Reuters) - A ceremonial plaza built 5,500 years ago has been discovered in Peru, and archaeologists involved in the dig said on Monday carbon dating shows it is one of the oldest structures ever found in the Americas.

A team of Peruvian and German archaeologists uncovered the circular plaza, which was hidden beneath another piece of architecture at the ruins known as Sechin Bajo, in Casma, 229 miles (370 km) north of Lima, the capital. Friezes depicting a warrior with a knife and trophies were found near the plaza.

"It's an impressive find; the scientific and archaeology communities are very happy," said Cesar Perez, the scientist at Peru's National Institute of Culture who supervised the project. "This could redesign the history of the country."

Prior to the discovery at Sechin Bajo, archaeologists considered the ancient Peruvian citadel of Caral to be one of the oldest in the Western Hemisphere, at about 5,000 years.

Scientists say Caral, located a few hours drive from Sechin Bajo, was one of six places in the world -- along with Mesopotamia, Egypt, China, India and Mesoamerica -- where humans started living in cities about 5,000 years ago.

"The dating done by the German archaeologists puts it at about 5,500 years," Perez said of the plaza, which has a diameter of about 46 feet (14 metres).

Earlier finds near Sechin Bajo had been dated at 3,600 years, and there may be other pieces of the citadel older than the plaza.

"We've found other pieces of architecture underneath the plaza that could be even older," German Yenque, an archaeologist at the dig site, told Reuters. "There are four or five plazas deeper down, which means the structure was rebuilt several times, perhaps every 100 to 300 years."

Hundreds of archaeological sites dot the country, and many of the ruined structures were built by cultures that preceded the powerful Incan empire, which reached its peak in the 16th century, just before Spanish conquerors arrived in what is now Peru.

There are so many archaeological treasures that tomb robbing is a widespread problem in the Andean country.

Yenque said the scientists are filling in the site with dirt to preserve it and plan to resume excavation of the deeper floors when they get more grants to fund the project.

"We are lucky it was never destroyed by tomb robbers; that is why we are covering it up now," Yenque said.

(Reporting by Marco Aquino, writing by Terry Wade, editing by Eric Walsh)

Tomb find reveals pre-Inca city

Archaeologists working in northern Peru have discovered a spectacular tomb complex about 1,000 years old.

The complex contains at least 20 tombs, and dates from the pre-Inca Sican era.

Among the discoveries are 12 "tumis", ceremonial knives which scientists have not been able to study in a burial site before, as well as ceramics and masks.

The Sican culture flourished from approximately AD 800-1300, one of several metalworking societies which succumbed to drought and conquest.

Archaeologists working on the project say the find will help them understand details of the culture.

Sican was a very organised society

Izumi Shimada"It is a religious city, a sacred settlement, and at each excavation site is a cemetery," Izumi Shimada told Peru's El Comercio newspaper.

"That tells us that Sican was a very organised society."

Professor Shimada, based at the University of Southern Illinois in the US, has been excavating Sican sites for a quarter of a century. The latest dig was performed in conjunction with the Sican National Museum.

Trading goods

The burial site sits on Peru's northern coast, near the town of Ferrenafe.

Discoveries in the tomb complex include tumis formed from an alloy of silver, copper and gold; masks, breastplates and ceramics.

The site contains at least 20 tombs, making it a "religious city"

Buried in a pyramid 30m (100ft) long, archaeologists found the bones of a woman in her early 20s surrounded by figurines of Sican gods, ceramics and objects in copper and gold.

Another set of bones, clearly from a person of some stature, were found in a seated position accompanied by a metallic crown, part of a thorny oyster, and various ceramic objects including a vase.

The tumis are a prize find, because until now the knives have come to scientists from tomb raiders. Finding them in situ would allow a closer understanding of their role in Sican culture, researchers said.
One of the tumis features a representation of Naylamp, the mythical founder of Sican society who according to legend emerged from the sea and became a god.

The Sican were noted for producing gold, silver and copper in quantities which were substantial for the period.

They traded shells and stones with societies in what are now Ecuador, Chile and Colombia.

Their civilisation had already declined by the time that the mightiest of Peruvian cultures, the Inca, rose to prominence about AD 1200.

Lost society tore itself apart

Two thousand years ago, a mysterious and little known civilisation ruled the northern coast of Peru. Its people were called the Moche.

They built huge and bizarre pyramids that still dominate the surrounding landscape; some well over 30m (100ft) tall.

They are so heavily eroded, they look like natural features; only close up can you see they are made up of millions of adobe mud bricks.

These pyramids are known as "huacas", meaning "sacred site" in the local Indian dialect. Several contain rich collections of murals; others house the tombs of Moche leaders.

As archaeologists have excavated these Moche sites, they have unearthed some of the most fabulous pottery and jewellery ever to emerge from the ancient world.

Archaeologist Dr Walter Alva with an elaborate Moche ear ornamentThe Moche were pioneers of metal working techniques such as gilding and early forms of soldering.

It enabled them to create extraordinarily intricate artefacts; ear studs and necklaces, nose rings and helmets, many heavily inlaid with gold and precious stones.

Archaeologists have likened them to the Greek and Roman civilisations in Europe.

But who were these extraordinary people and what happened to them? For decades the fate of the Moche has been one of the greatest archaeological riddles in South America.

Now, at last, scientists are coming up with answers. It is a classic piece of archaeological detective work.

'Mud burials'

This week's Horizon tells the story of the rise and fall of a pre-Inca civilisation that has left an indelible mark on the culture and people of Peru and the central Andes Mountains.

One of the first important insights into this remarkable culture came in the mid-1990s when Canadian archaeologist Dr Steve Bourget, of the University of Texas in Austin, made a series of important discoveries.

Excavating at one of the major Moche huacas - a site known as the Huaca de la Luna - he came across a series of dismembered skeletons that bore all the signs of human sacrifice.

Archaeologist Luis Jaime Castillo holds a Moche ceramic depicting warriors engaged in ritual combatHe also found that many of the skeletons were so deeply encased in mud the burials had to have taken place in the rain.

Yet in this part of Peru it almost never rains; it could not have been a coincidence. Bourget speculated that the Moche, like many desert dwelling peoples, had used human sacrifice to celebrate or encourage rain.


The theory appeared to explain puzzling and enigmatic images of human sacrifice found on Moche pottery; it provided a new insight into Moche society; yet it did not explain why this apparently sophisticated civilisation had disappeared.

Then American climatologist Dr Lonnie Thompson, of Ohio State University, came up with a startling new find. Using evidence from ice cores drilled in ancient glaciers in the Andes, he found that at around AD 550 to 600, the coastal area where the Moche lived had been hit by a climatic catastrophe.

Internal collapse

For 30 years the coast had been ravaged by rain storms and floods - what is known as a Mega El Niño - followed by at least 30 years of drought. All the human sacrifices in the world would have been powerless to halt such a disaster.

It seemed a plausible explanation for the demise of a civilisation.
But then in the late 1990s, American archaeologist Dr Tom Dillehay revisited some of the more obscure Moche sites and found that they dated from after AD 650.

Thompson's ice cores have opened up the climate history bookMany were as late as AD 750, 100 years after the climatic double-whammy. He also found that at these later settlements, the huacas had been replaced by fortresses.

The Moche had clearly survived the climatic disaster but had they then been hit by an invasion? Dillehay cast around but could find no evidence for this.
He now put together a new theory, one that, in various guises, is now widely accepted by South American experts.

The Moche had struggled through the climatic disaster but the leadership - which at least in part had claimed authority from its ability to determine the weather - had lost authority and Moche villages and/or clan groups had turned on each other in a battle for scarce resources such as food and land.
Moche society had pulled itself apart.

Food of the Andes by the Golden Gate

SAN FRANCISCO has a well-deserved reputation for restaurant fare that is freshly inventive, but with studiously authentic roots. Gastón Acurio, a celebrity chef in Lima, Peru, known for his novo-Andino cuisine, which adds modern sensibilities about freshness, presentation and technique to the culinary traditions of Peru, took note of this when considering where to open his beachhead restaurant in the United States.

“In San Francisco, people love to eat, and are open to new cultures and flavors,” Mr. Acurio said. “It’s the best place for us to start our dream of bringing our food to America.”

The city’s connection to Peru dates back to Gold Rush days, when pisco, white Peruvian brandy, was the drink of choice. So late last year, Mr. Acurio opened La Mar Cebicheria Peruana (Pier 1 ½; 415-397-8880; www.lamarcebicheria.com), adding to a collection of Peruvian restaurants to make San Francisco perhaps the best place in North America to sample Peru’s rapidly evolving, fervid foodie scene.

A new generation of often classically trained chefs (Mr. Acurio studied at Le Cordon Bleu in Paris) is making wildly creative use of Peru’s diversity. The country’s climate zones range from Amazonian to alpine, nurturing all kinds of foods, and its riot of cultural influences includes Andean, Spanish, Chinese, Japanese and African.

“By nature, Peruvian cuisine is a fusion cuisine,” said Alejandro Reccio, chef de cuisine at Limón, an elegantly boisterous Peruvian restaurant in the Mission District. Limón (524 Valencia Street; 415-252-0918; www.limon-sf.com) was recently closed for remodeling but is reopening soon. Meanwhile, an annex, Limón Rotisserie (1001 South Van Ness Avenue; 415-821-2134; www.limonrotisserie.com), is serving a limited but well-executed menu focusing on pollo a la brasa — rotisserie chicken.

Ceviche, the classic dish of raw fish marinated in lime juice and spices, contains echoes of Inca dishes, but with limes, a Spanish introduction. In its modern form, it arose at the hands of Japanese chefs employed in the kitchens of Peruvian gentry. At Limón, the ceviche de pescado ($9.25) is dependably good; a zingy sauce and delectable choclo (big Peruvian corn) kernels enliven toothsome chunks of halibut.

Limón combines sophisticated interpretations of Peruvian cuisine like this with exquisitely executed, unembellished Peruvian comfort food like pollo a la brasa ($9.50 for a half chicken). Marinated in oregano, cumin and lime, it was tender with a lightly spiced bite. It was accompanied by dipping sauces made with Andean herbs and peppers.

Piqueo’s (830 Cortland Avenue; 415-282-8812; www.piqueos.com), in the Bernal Heights neighborhood, is a red, intimate corner with a small, bustling open kitchen and the friendly vibe that is de rigueur at San Francisco’s Peruvian restaurants. For five years, the chef, Carlos Altamirano, has supplied this quiet neighborhood with daring novo-Andino inventions. They include plates of tequeños ($10), wispy wontons filled with ground squid, fried and dusted in sugar and cinnamon; and pastel de choclo ($10), a mounded torte of choclo and potato alive with peppery watercress.

On a more basic level, numerous small restaurants around San Francisco serve the straightforward fare of Lima’s neighborhoods.

At one such place, Mi Lindo Peru (3226 Mission Street; 415-642-4897), a cheerful, unpretentious space of fake wood paneling and Inca kitsch, the ceviche ($14.95) is a big pile of seafood that with a hoppy Cusqueña lager ($4) could constitute a great lunch on its own. But I followed it up with parihuela ($15.95), a classic Peruvian bouillabaisse overflowing with soft, yielding chunks of fish that contrasted with chewy squid and clam in a rich red broth.

Just up the street, I found Inkas (3299 Mission Street; 415-648-0111; www.inkasrestaurant.com), a lively spot in an old, high-ceilinged bank building, and joined a happy, noisy lunch crowd (including lots of happy, noisy children) for more basic fare: coastal Peruvian dishes as they might be created by a home cook. This meant that classics like ceviche mixto ($14) and pollo saltado (chunks of chicken sautéed with peppers, onions and French fries, $12) were filling without being inspired. Only the anticuchos, skewers of beef heart ($7), really stood out: they were perfectly done, like succulent lean steak, peppery and piquant with a wash of lime.

La Mar, Mr. Acurio’s new establishment, is a big, elegant space overlooking San Francisco Bay. Moody blue light is combined with dark wood and tiles. But flavors seemed to take a back seat to presentation in some of its small plates on the night of my visit.

The ceviches ($16 to $19) were lovely assemblages of fish, but the sauces seemed a little wan. Cebiche Nikei ($17) presented succulent tuna with Japanese cucumber and avocado that only made me miss sushi.

The causas ($11 to $12) at La Mar take the form of delicate cups of suave, cool whipped potatoes of startling hues topped with subtle delicacies, rather than the filling snack that goes by that name in coastal Peru. These causas verged on conceptual: better seen and not tasted.

But the mains were satisfying. Arroz norteño ($24) was smoky, with succulent calamari and sparkling salsa criolla. Cau cau ($31) — roasted scallops with a corn risotto — were succulent and sweet, set free by simple flavors and a pleasant saltiness.

And desserts were stellar: exquisite chocolate bombs called buñuelos ($12), and dessert spring rolls ($10) stuffed with sweet rice pudding and served with bright mango sorbet and fresh mint serving as counterpoint to the elegant crunch.

In the end, it was delightful. Inside La Mar, the crowd grew and the sound rose to a roar. Outside, lights gleamed in the black bay water. And Mr. Acurio’s vision — to make ceviche as known and beloved as sushi — seemed a noble cause indeed.

Peru's Wild Rainforest

Stay at an Amazon eco-lodge to experience a jungle teeming with life

Paddington Bear is said to have lived in "darkest Peru" with his Aunt Lucy until she moved to the Home for Retired Bears in Lima. My suspicion is that he came from some part of the Peruvian rainforest.

Before taking this trip, I only associated the Amazon jungle with Brazil, so discovering that it includes part of Peru adds to a sense of mystery. We take a short flight from Cusco to Puerto Maldonaldo, leave surplus luggage in a travel company office, then board a motorized boat for a half-hour trip down the Madres del Dios River -- a wide, muddy tributary of the Amazon.

Gallery: Explore Peru
Gallery: Discover Lima
Gallery: See More of Peru

We hike three kilometres of trail, then spend a final half hour in a canoe being paddled across Sandoval Lake. As one guide book says, "getting there is half the fun".

In the late afternoon, after a brief recovery time in the lodge, we take a two-hour boat trip, being silently paddled around the banks of this huge oxbow lake, a non-intrusive way to observe in safety. The boat is two canoes joined by a viewing platform, catamaran style.

Lonely Planet guide to Peru
Lonely Planet guide to Lima

Every aspect of the environment seems teeming with life. It is almost sensory overload as even the air is alive with noises from the jungle. We are treated to the raucous passing of a large troupe of squirrel monkeys crashing from tree to tree.

It is understated to describe bird life as abundant as we see everything from herons to vultures. As dusk falls, there are waves of different species of birds taking turns to devour the insects -- once the night hawks have had their fill, hoards of bats swoop in the fading light.

Apparently it is just as active below the water's surface with piranhas, stingrays, and electric eels -- information that reduces the temptation of trailing your hand in the water.

We are told the story of a giant anaconda that tried to pull a dog off a boat and how the owner lost a piece of arm in a successful attempt to save his pet.

Modest-sized white caiman (from the crocodile family) watch us from the banks and only dive when our boat gets too close. Adult caiman are reputed to be formidable; we hear of another lodge where meat was thrown into the water so tourists could actually see the larger black caiman, until a lone photographer was attacked and killed.

Perhaps it's better not to disturb natural cycles. I'm content just to see the shore dotted with menacing sets of red gleams, the reflection of their eyes in flashlight beams.

The next trip around the lake leaves at six the following morning, a thick mist giving the scene a magical quality. We are rewarded with our first sighting of a family of giant otters jostling and diving and making a sound rather like Chewbacca from Star Wars.

Later, through binoculars we see them munching on part of the six kilos of fish that each adult consumes every day.

The lodge is really happy that this family is increasing; a sign that tourists are not causing much of an "ecological footprint." The lodge deserves the positive publicity produced by a BBC documentary filmed on this lake about the life of giant otters.

A guide leads a small group on a botanical walk through jungle trails. She describes the normal squawks of multi-coloured macaws, and attributes their absence this morning to the looming presence of sentinel hawks.

We hear stories about how the garlic tree protects animals sleeping among its roots. We marvel at walking trees with their many small trunks allowing them to move up to 50 centimetres a year in order to get more sunlight.

Products from the jungle are amazing in their scope and variety: everything from leaves that make lipstick to bark that can bring about abortion.

We discuss the ethics concerning the profits made by certain North American pharmaceutical companies who base various drugs on rainforest products yet provide no recognition to the country of origin.

There is one intriguing product which, when taken after fasting, is supposed to cause you to see episodes from your past, both good and bad.

Our guide tells us of his experience with a Curandero or shaman who made a potion including the bark of the kapok or ironwood tree. J. K. Rowling should come here if she needs additional inspiration to end the Harry Potter series.

Sandoval Lake Lodge is built out of ecologically correct driftwood mahogany and is partly owned by a non-profit conservation group. It provides a restful haven with excellent food, and a row of hammocks for reading and dozing through afternoon heat.

In the evenings mosquito nets are arranged around beds, although the mosquitoes are surprisingly minimal. The generator goes off at 10 p.m. sharp, ending all activity as the lodge is plunged into darkness.

Many guests are keen naturalists, like a couple from Scotland who came to see just one bird that inhabits this particular area of Peru. But we are content to watch the sunset over the water, and wonder why Paddington ever decided to leave. Darkest Peru has so much to entice you to stay.

On the web:

Sandoval Lake Lodge: www.inkanatura.com/sandovallakelodge.asp

Five Places You Should Visit Now for Authentic Experiences

09/4/08

Northern Interior, Peru



For many travelers, Peru has become synonymous with Machu Picchu.

However, in the largely undiscovered North, Peru’s rich culture combines with extraordinary opportunities for adventure activities as well as more gentle nature and wildlife experiences. My colleagues at Xola worked in Peru for several weeks this spring and turned up the following off-the-radar itinerary.

From Chiclayo, drive to Chachapoyas, home to the ancient People of the Clouds before the Inca took over their civilization.

The basis for this culture’s name was evident as our car edged up the mountain in dense cloud cover until we were rewarded at our destination with a stunning view of sharp mountain peaks poking through downy, white clouds.

Hike or ride horseback through the area to view the ruins that archaeologists are just starting to map and excavate. The massive fortress at Kuelap is quickly gaining recognition as “the Machu Picchu of Northern Peru,” with over 400 buildings enclosed by a 70-foot stone wall.

The members of the Xola team were the only visitors at the site that day, and marveled at how the Chachapoyas people created this stone compound atop a mountain without the use of the wheel.

The burial ground of Karajia features impressive capsule-like tombs built into the hillside. Stop by the museum in Leymebamba to view over 200 mummies recovered from the remote Lake of the Condors.

When you have had your fill of cultural history, take a kayak down the Utcumbamba River, explore the colonial town of Levanto, or wander the Sunday market at Tingo. Be sure to try the milanesa at La Tushpa restaurant in town!

More Info:
http://www.inkanatura.com/interiorchachapoyaskuelap.asp

The Big Trip: Peru

On the Inca’s Trail

Conquering Peru’s Amazon wilderness, ancient ruins, and newfound treasures is easier than ever.

Text by Robert Earle Howells

Map by Emily Cooper
National Geographic Adventure magazine

Every trekker who tackles the 5,900-foot gain of Peru’s Inca Trail eventually ponders an ancient mystery: Were the folks who carved the original route to Machu Picchu awesomely adapted to high-mountain life? Or just oblivious to little courtesies that future visitors from sea level might appreciate, like switchbacks?

Fortunately, the thigh-busting Inca austerity program is now optional, since a slew of private operators have invested in Peru’s once rustic tourist infrastructure over the past few years. This recent boost has made discovering the Lost City more feasible than ever and raised standards of accessibility across the country. These days, Peru’s lesser known classics—from high-altitude ruins to damp lowland jungles to colonial cities—are within easy reach on a weeklong itinerary, so you can set the level of challenge as high (or low) as you please.

1. Machu Picchu

Face the Undisputed Andes Champ

It’s easy to see why the Lost City of the Inca got misplaced, so dramatically hidden is its perch at 7,970 feet, beneath the cloud forested spire of Huayna Picchu. A 2,000-foot drop-off to the roiling Urubamba below guards its three riverside flanks. Machu Picchu was built in the 15th century as a royal religious retreat for Inca rulers, and the supernatural majesty of its stone facades and terraces makes it one of the world’s most compelling sites, even if it’s besieged by 2,000 visitors a day. The 24-mile Inca Trail is the trophy approach, but it requires making reservations up to four months in advance with licensed outfitters—and the will to challenge steep, 15,000-foot passes. (Watching your porters dance up the hills in flip-flops is a humbling reminder that Inca messengers once sprinted this route.) Less crowded alternatives include the 35-mile Camino Salcantay and the off-the-radar, 20.5-mile Lares Trek. Or you can zip to Machu Picchu in a single day by taking the train from Cusco to Aguas Calientes and catching a shuttle from there. You’ll have plenty of company.

Links:
More About Machu Picchu
http://www.inkanatura.com/moreaboutmachupicchu.asp


2. Cotahuasi River

Raft a Grander Canyon

The chance to run whitewater in a canyon twice the depth of the Grand is reason enough to head for the Cotahuasi—and the rapids truly are extraordinary: At its late-spring peak, the froth flows for a hundred miles at continuous Class IV, with some stretches of Class V. Set out from the so-called White City, Arequipa, a former Spanish colonial settlement built mostly of pearly volcanic rock. From there, a 15,500-foot pass leads to the remote village of Cotahuasi, "a happy little place in the middle of nowhere," as BioBio Expeditions river guide Marc Goddard puts it. Then take a ten-mile, mule-assisted hike skirting thundering Sipia Falls before commencing seven rollicking days on the river.


3. Choquequirau

Trek to Machu Picchu’s Cool Kid Sister

Choquequirau is the Quechua word for "Inca ruin without hordes of tourists arriving by train." (Actually, it means "cradle of gold.") Machu Picchu’s sister city, tucked into the saddle of a 9,950-foot cloud forest ridge in the Andes, is nearly as impressive in size, stonework, and design. Outsiders discovered Choquequirau more than 300 years ago, but restoration began only in 1993. Even today, just a third has been excavated. Getting there is tough, but that means the site sees just a tiny fraction of Machu Picchu’s visitation and that permits can be arranged on the fly. The two-day trek starts in the town of Cachora, five hours from Cusco by bus. From there, a 20-mile trail plummets 5,000 feet to the Apurímac River, then climbs 4,000 feet to the ruins, where you can pitch camp outside—without another tourist in sight.

Links:
More about Choquequirao
http://www.inkanatura.com/choquequirao_treksinkanatura.asp


4. Kuelap & the World’s Third Highest Waterfall

Explore the Mysteries of the North

Long before the Inca swept through Peru, the Chachapoya people of the northern Andes established a mountaintop city called Kuelap (circa 500 a.d.) that holds its own in any battle of ancient engineering marvels. It’s been known to the modern world since 1843, when it was hailed as northern Peru’s "Tower of Babel," but since it didn’t have Hiram Bingham (and National Geographic’s ink) to tout its glories like Machu Picchu did, Kuelap remains little known and rarely visited to this day. The monumental fortress is an easy 23-mile drive south from the town of Chachapoyas. Kuelap has only three entrances, each a narrow staircase that slices through the outside wall, leading to a city of hundreds of limestone structures inside. Near Chachapoyas, you can also trek to the two-tiered, 2,530-foot Gocta Waterfall, the third highest in the world.

Links:
Chachapoyas, Kuelap and Cajamarca
http://www.inkanatura.com/interiorchachapoyaskuelap.asp

5. Cusco & the Sacred Valley

Find Your Comfort Zone

The base camp for Machu Picchu and one-time capital of the Inca Empire is today’s Kathmandu of Peru—a nexus of outfitters packed with great cheap eateries, five-star hotels, and open-air vendors crowding the narrow cobbled lanes (hawking alpaca sweaters instead of prayer flags). The altitude here (11,500 feet) dictates a go-slow strategy for gradual acclimation, so take a few days to explore locally. Just above the city sits the Inca fortress of Sacsahuaman, an eerie architectural wonder built with stones weighing hundreds of thousands of pounds each. About 11 miles northeast of Cusco, the terraced village of Pisac becomes a vast indigenous market on Sundays, Tuesdays, and Thursdays, where Quechua-speaking locals sell woven hats to the tune of panpipe music. The Sacred Valley of the Inca merits a day to ogle more mind-blowing ruins, notably the massive pink granite complex at Ollantaytambo, and is just 32 miles away, accessible by train, bus, or cab.

Links:
Inca Trail to Machu Picchu
http://www.inkanatura.com/machupicchuandincatrailcusco.asp

Scientists get dirt on mystery plant

May 5, 2009, by Kim mcguire, www.stltoday.com

The quest to solve a 70-year-old mystery led Rainer Bussmann and Douglas Sharon to northern Peru to interview traditional healers, or curanderos, about a plant that seemingly vanished more than a thousand years ago.

Known as the Ulluchu, the plant turns up in ancient artwork, often seen floating over the soldiers marching off to be sacrificed or flying priests.

But while the curanderos have heard of the Ulluchu, it is not something they use. They cannot describe the plant, and it has no place in their language.

Almost eight years later, however, Bussmann and Sharon have identified the Ulluchu while showing how the plant might have played a key role in human sacrifice. Not only does it appear the plant triggered hallucinations for priests, but it also helped get the blood flowing for those on the sacrificial altar.

And in a surprising twist, the discovery may have turned up modern medical therapies for some age-old health problems.

"For the last 70 years people have been trying to identify this fruit but couldn't," said Bussmann, an ethnobotanist at the Missouri Botanical Garden. "And when our work started, I thought to myself, 'This is not going to be simple.'"

To understand how Bussmann cracked the case of the Ulluchu, the story goes back to 1930. That's when a Peruvian archaeologist first noted the appearance of a comma-shaped fruit frequently shown in the artwork of the Moche, a agriculture-based culture that lived in northern Peru from A.D. 100 to 800.

The archaeologist dubbed the fruit Ulluchu, and scientists have been trying to identify it ever since. Cousins of the papaya and wild avocado are just some of theories that have been scientifically dismantled.

Bussmann became intrigued by the Ulluchu mystery while working at the University of Texas. And in 2001, he and Sharon began conducting fieldwork in northern Peru, home of the Moche.

"We would go to these markets and people would say, 'We think we know what that is, but it's not being sold here,'" said Sharon, the retired director of the Phoebe A. Hearst Museum of Anthropology at the University of California-Berkley. "Well, one of the reasons it wasn't being used is because the Ulluchu seems to show up during sacrifices. And no one is being sacrificed anymore."

They did find some evidence in the Quechua language, where Ulluchu roughly translates to "penis pepper."

More on that later.

Still, Bussmann had to sort through more than a thousand botanical suspects in one of the most biodiverse spots in the world in hopes of singling out the Ulluchu.

Then a breakthrough.


Archeological excavations at the ancient Moche city of Sipan and the tombs of Dos Cabezas unearthed actual desiccated remains of the fruit. And true to the Quechua translation, the plant indeed has a phallic shape.

"Rainer is a first-rate taxonomist," Sharon said. "He studied every physical characteristic of these plants until he was absolutely certain we had it."

Bussmann began to suspect their elusive plant had hallucinogenic properties. Remember the flying priests? One of them appears to be holding an instrument that Bussmann believes is snuff tube.

With it, priests might inhale ground Ulluchu seeds, get high, and then commence with the sacrifices, he deduced.

"So imagine you're a priest and it's your job to convince God to stop the rain," Bussmann said. "You need some pretty strong stuff."

Bussmann began closing in on a genus of fairly common plants known as Guarea that are found throughout Peru's lowland forests.

He determined that the plants contain compounds that could cause hallucinations if the seeds were ingested. Another effect of eating those seeds would be elevated blood pressure.

Getting the blood to flow quickly would certainly aid in sacrifices, Bussmann thought. And it would explain why the soldiers about to be sacrificed appeared to have erections in the scenes that Moche drew.

What might explain that physical reaction to pending death?

"That was what really got the bell ringing for me," Bussmann said.

When Bussmann compared specimens of Guarea kept in the garden's herbarium to drawings of the Ulluchu that were unearthed about a decade ago, he knew he had a match.

"When I saw the Guarea, I thought, 'That's pretty conspicuous looking.'"

In late March, Bussmann and Sharon published their findings in a scientific journal, identifying Guarea as the mystery plant, Ulluchu. So far, no one seems to be challenging the identification.

Bussmann, director of the garden's William L. Brown Center for Plant Genetic Resources, plans to further study the plant's chemistry and suspects it might have applications as a blood pressure and erectile dysfunction treatment.

Meanwhile, archaeologists continue to dig at Moche burial sites. Because of Bussmann and Sharon's discovery, they know a little more about human sacrifices, many of which occurred during times of extreme weather events and were meant to pacify the gods.

"When life gets unsettled, people find ways to cope with it," Bussmann said. "It all makes perfect sense now."

Peruvian Stalagmites Hold Clues To Climate Change

ScienceDaily (May 16, 2009) — How will the Netherlands, dominated by water, be affected by future climate change? Dutch researcher Martin van Breukelen hopes to answer that question by analyzing stalagmites from the South American Amazon tributaries in Peru as a way to reconstruct climate changes in the past.

Information that can be used to test climate models is stored in various forms: in ice formations, plant remnants, oceans and caves. Limestone formations in caves, so-called speleothemes, provide insights into the land climate. The best-known speleothemes are stalagmites, standing formations and stalactites, hanging formations. Van Breukelen discovered stalagmites in South America that provide information about the climate over the past 13,000 years.

In order to study climate change, Van Breukelen analyzed the accumulation of oxygen isotopes in both the cave water and the stalagmite. A small quantity of fossil cave water is enclosed in the core of the stalagmite, so-called fluid inclusions. The entrapped water is just as old as the carbonate of the stalagmite in which it is trapped. The isotope ratio of this fossil water can be measured using an extraction technique. As this water has been entrapped for thousands of years it provides unique information about the climatic history.

Much climate research on the land and sea is based on the measurement of subtle changes in the ratio between stable oxygen isotopes in, for example, ice or stone formations. Isotopes of an element can have different numbers of neutrons but always contain the same number of protons. Light isotopes (¹⁶O) respond differently to climate change than heavier isotopes (¹⁸O). Climate changes result in an altered ratio of the ¹⁶O and ¹⁸O isotopes. The ratio of the different isotopic elements oxygen, carbon and hydrogen provides a lot of useful information about the climatic history. Van Breukelen uses this information to reconstruct the changes in temperature and precipitation.

Climate research reveals that even without human influence the Earth's climate was changeable in the past. To what extent humans have influenced climate change since the industrial revolution remains unclear. It should be remembered that studies into climatic history can provide insights into the natural behaviour of the climate in the past. Additionally current climate models can only be improved if more historical data become available so that the accuracy of these models can be tested. The research method used by Van Breukelen that examines stalagmites is vitally important for climate research. This method allows the accurate reconstruction of independent temperature changes and precipitation patterns from thousands of years ago.

Van Breukelen's research was funded by a grant from the NWO division WOTRO Science for Global Development. WOTRO focuses on funding innovative scientific research into development issues, especially sustainable development and poverty alleviation.

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Adapted from materials provided by NWO (Netherlands Organization for Scientific Research).

First Evidence Of Pre-industrial Mercury Pollution In The Andes

ScienceDaily (May 18, 2009) — The study of ancient lake sediment from high altitude lakes in the Andes has revealed for the first time that mercury pollution occurred long before the start of the Industrial Revolution.

University of Alberta Earth and Atmospheric Sciences PhD student Colin Cooke's results from two seasons of field work in Peru have now provided the first unambiguous records of pre-industrial mercury pollution from anywhere in the world and will be published in the May 18th Early Edition of the Proceedings of the National Academy of Sciences (PNAS).

"The idea that mercury pollution was happening before the industrial revolution has long been hypothesised on the basis of historical records, but never proven," said Cooke whose research was funded by the National Geographic Society.

Cooke and his team recovered sediment cores from high elevation lakes located around Huancavelica, which is the New World's largest mercury deposit. By measuring the amount of mercury preserved in the cores back through time, they were able to reconstruct the history of mercury mining and pollution in the region.

"We found that mercury mining, smelting and emissions go back as far as 1400 BC," said Cooke. "More surprisingly, mining appears to have began before the rise of any complex or highly stratified society. This represents a departure from current thinking, which suggests mining only arose after these societies emerged," said Cooke.

Initially, mercury pollution was in the form of mine dust, largely resulting from the production of the red pigment vermillion. "Vermillion is buried with kings and nobles, and was a paint covering gold objects buried with Andean kings and nobles," said Cooke. However, following Inca control of the mine in 1450 AD, mercury vapour began to be emitted.

"This change is significant because it means that mercury pollution could be transported over much greater distances, and could have been converted into methylmercury, which is highly toxic," said Cooke.

"All of these results confirm long-standing questions about the existence and magnitude pre-industrial mercury pollution, and have implications for our understanding of how mining and metallurgy evolved in the Andes," said Cooke.

Cooke is an interdisciplinary scientist researching human impacts on the environment. His research combines paleolimnology (the study of ancient lake sediments) with the fields of archaeology, and geochemistry. The research team included Prentiss Balcom from the University of Connecticut (USA), Harald Biester from the University of Braunschweig (Germany), and Alexander Wolfe from the University of Alberta

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Adapted from materials provided by University of Alberta, via EurekAlert!, a service of AAAS.

EBay Has Unexpected, Chilling Effect On Looting Of Antiquities, Archaelogist Finds

ScienceDaily (May 9, 2009) — Having worked for 25 years at fragile archaeological sites in Peru, UCLA archaeologist Charles "Chip" Stanish held his breath when the online auction house eBay launched more than a decade ago.

"My greatest fear was that the Internet would democratize antiquities trafficking, which previously had been a wealthy person's vice, and lead to widespread looting," said the UCLA professor of anthropology, who directs the UCLA Cotsen Institute of Archaeology.

Indeed, eBay has drastically altered the transporting and selling of illegal artifacts, Stanish writes in an article in the May/June issue of Archaeology, but not in the way he and other archaeologists had feared.

By improving access to a worldwide market, eBay has inadvertently created a vast market for copies of antiquities, diverting whole villages from looting to producing fake artifacts, Stanish writes. The proliferation of these copies also has added new risks to buying objects billed as artifacts, which in turn has worked to depress the market for these items, further reducing incentives to loot.

"For most of us, the Web has forever distorted the antiquities trafficking market in a positive way," Stanish said.

Looting, which is illegal, is widely recognized as destructive to cultural heritage because it can remove from public ownership tangible links to a people's past. In addition, looting is perceived as the enemy of scholarship because it typically is done without regard to any appropriate methods that allow scientists to date objects and to place them in a larger, more meaningful context.

One of the world's premiere authorities on Andean archaeology and supervisor, at UCLA, of the one of the world's largest collections of working archaeologists, Stanish has been tracking objects billed as antiquities on eBay for more than nine years. His conclusions also are informed by experiences with the U.S. customs service, which occasionally asks him to authenticate objects. In addition, Stanish has visited a number of workshops in Peru and Bolivia that specialize in reproductions of pottery and has interviewed these artisans. While his background is in South American archaeology, he has tracked eBay listings of antiquities from many cultures.

"Chinese, Bulgarian, Egyptian, Peruvian and Mexican workshops are now producing fakes at a frenetic pace," he writes.

When he first started tracking eBay's sales of antiquities, Stanish focused mainly on objects related to his field. At the time, the ratio of real artifacts to fakes was about 50-50, he estimates. About five years later, 95 percent were fakes. Now, he admits, he can't always tell, because the quality of the fakes has improved so much.

He estimates that about 30 percent of "antiquities" currently for sale on eBay are obvious fakes, in so much as creators mix up iconography and choose colors and shapes for visual effect rather than authenticity. Another 5 percent or so are genuine treasures. The rest fall in the ambiguous "I would have to hold it in my hand to be able to make an informed decision" category, he writes. Stanish admits himself to occasionally being duped by fakes encountered in shops in areas where both looted items and fakes are sold.

The advent of eBay has had the biggest impact on the antiquities market by reducing the incentive to unearth precious treasures in the first place, Stanish has found.

"People who used to make a few dollars selling a looted artifact to a middleman in their village can now produce their own 'almost-as-good-as-old' objects and go directly to a person in a nearby town who has an eBay account," he said. "They will receive the same amount or even more than they could have received for actual antiquities."

As a result of the rise of a ready market, many of the primary purveyors have shifted from looting sites to faking antiquities.

In addition to linking craftsmen with a market for cheap fakes, eBay has tended to have a depressing effect on prices for real looted artifacts, further discouraging locals from pillaging precious sites.

"The value of ... illicit digging decreases every time someone buys a 'genuine' Moche pot for $35, plus shipping and handling," he writes. (An authentic antiquity would sell for upwards of $15,000.)

So far, authentication techniques have struggled to keep abreast of increasingly sophisticated fakes, Stanish said. Pottery can still be authenticated reliably, although the process is costly. In addition, forgers tend to only guarantee the authenticity of their pieces as long as no form of "destructive" analysis is used. While just a tiny flake of pottery is required for thermoluminescence dating — the gold standard for pottery — the process is technically considered destructive, Stanish points out, so the test invalidates such warrantees, no matter its conclusion.

Thanks to laser technology and chemical processes for forming antique-appearing patinas, stone and metal, reproductions are "almost impossible" to authenticate using today's technology, Stanish writes. However, the prospect of authentication techniques eventually catching up with today's fakes is also having a chilling effect on the market for antiquities, by dramatically adding to the risk of illicit, high-end trafficking.

"Who wants to spend $50,000 on an object 'guaranteed' to be ancient by today's standards, when someone can come along in five years with a new technology that definitively proves it to be a fake," he asks.

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Adapted from materials provided by University of California - Los Angeles.

Dwarf In The Elfin Forests: Tiniest Frog In South America’s Andes Mountains

ScienceDaily (Apr. 6, 2009) — It fits on a fingertip: Noblella pygmaea is a midget frog, the smallest ever found in the Andes and among the smallest amphibians in the world. Only its croaking was to be heard from the leaves on the mossier ground of the “elfin forests” in the highlands of Manu National Park, before German and Peruvian herpetologists discovered the tiny little thing in south-eastern Peru.

The popular name of the new species is fitting: Noble’s Pygmy Frog has an average length of 11.4 millimeters. It was introduced in a paper recently published in the journal Copeia by Edgar Lehr, a German herpetologist at the Senckenberg Natural History Collection Dresden, and the Swiss-Peruvian ecologist Alessandro Catenazzi from the University of California at Berkeley, USA. The pygmy that fits on a fingertip was discovered during field work in the Wayqecha Research Station. Not only its small size left it undiscovered for so long. Its predominantly brown colour camougflages Noblella perfectly. But Noble’s Pygmy Frog could be spotted with the assistance of the members of the native communities adjacent to the Manu National Park.

Manu National Park is well known as “hotspot” in the lowland rainforests, a place of exuberant diversity; however the biosphere reserve also preserves vast areas of montane cloud forests, where the sempiternal mists envelop and often conceal plants and animals. In the countless ecological niches many of them were able to evolve undisturbed and are highly adapted to the cold and permanently humidity at a daily average temperature of 11° Celsius. Genetic studies show that the diversity of amphibians in general and especially in this region is highly underestimated. That is why Edgar Lehr and Alessandro Catenazzi think that Noblella pygmaea is only one of many undiscovered amphibians in the Andes mountain area. The scientists expect to find other new species during the next few years.

Currently the midget frog is one of the smallest vertebrates ever found above 3000 metres, where most species tend to be larger than congeneric or similar species in lowland areas. Noblella pygmaea inhabits the cloud forest, the montane scrub and the high-elevation grasslands at a height from 3025 to 3190 metres above sea level. Beside its size the remarkably long forefinger is a notable distinguishing feature that was not found at other pygmy frogs in the mountains of Peru. The females lay only two eggs of approximately four millimeter in diameter. In contrast to most amphibian species these eggs are laid in moist, terrestrial microhabitats, such as in moss or leave litter, and are protected from insect predators by the mother frog. It is noteworthy also that embryos do not change into aquatic tadpoles, but immediately after the hatching lead a fully terrestrial life.

Whilst the scientists cannot give a reason for Noblella’s minute size, it is apparently advantageous. Maybe it is perfectly adopted to its special niche. The fact, that the species is not forced to leave its habitat – not even for egg deposition – might protect it from natural enemies. Despite living in the Manu Biosphere Reserve the survival of the midget frog and of other amphibians is uncertain. Several adverse influences such as anthropogenic habitat changes and the effects of global warming, which among other things facilitates the dispersal of the highly virulent pathogenic fungus Batrachochytrium dendrobatidis threaten amphibians of the Andean region. Fotunately the fungus, which has become epidemic, has not been noticed on Noblella so far. Possibly because of its terrestrial life Noblella is less exposed to the fungus than stream-dwelling frogs.

Batrachochytrium dendrobatidis is suspected to be the cause of the extinction of many frog species in Ecuador and northern Peru and is currently decimating populations of high-elevation frogs in southern Peru. Up to now no effective means are known for stopping the expansion of fungal infections in the region. Researchers hope that the large topographic heterogeneity of the Andes cordilleras will provide refugia where the fungus is unable to cause massive population declines in amphibian species, thus ensuring the survival of the dwarf in the Andean "elfin forests."

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Adapted from materials provided by Senckenberg Research Institute and Natural History Museum, via AlphaGalileo.

Evidence From Dirty Teeth: Ancient Peruvians Ate Well

ScienceDaily (Dec. 3, 2008) — Starch grains preserved on human teeth reveal that ancient Peruvians ate a variety of cultivated crops including squash, beans, peanuts and the fruit of cultivated pacay trees. This finding by Dolores Piperno, staff scientist at the Smithsonian Tropical Research Institute and the National Museum of Natural History, and Tom Dillehay, professor of archaeology at Vanderbilt University, sets the date of the earliest human consumption of beans and pacay back by more than 2,000 years and indicates that New World people were committed farmers earlier than previously thought.

In northern Peru’s Ñanchoc Valley, Dillehay and colleagues recovered human teeth from hearths and floors of permanent, roundhouse structures. Human bone, plant remains and charcoal closely associated with the teeth are approximately 6,000 to 8,000 years old according to carbon- dating techniques.

Piperno examined 39 human teeth, probably from six to eight individuals. “Some teeth were dirtier than others. We found starch grains on most of the teeth. About a third of the teeth contained large numbers of starch grains,” Piperno said.

To identify the starch grains, Piperno compared the particles in tooth scrapings with her modern reference collection of starch grains from more than 500 economically important plants. “We found starch from a variety of cultivated plants: squash, Phaseolus beans—either limas or common beans, possibly, but not certainly the former, pacay and peanuts,” said Piperno. “Parts of plants that often are not evident in archeological remains, such as the flesh of squash fruits and the nuts of peanuts, do produce identifiable starch grains.”

Starch from squash found on the teeth affirms that early people were eating the plants and not simply using them for nonfood purposes, such as for making containers or net floats. Whether or not some of the earliest cultivated plants, such as squashes, were grown as dietary items has been a long-debated question among students of early agriculture.

Evidence that foods had been cooked was also visible on some of the starch grains. “We boiled beans in the lab to see what cooked starch grains looked like—and recognized these gelatinized or heat-damaged grains in the samples from the teeth,” said Piperno. Starch from raw and roasted peanuts looks similar, probably because it is protected within the hull.

Starch grains from four of the crops were found consistently through time indicating that beans, peanuts, squash and pacay were important food sources then, as they are today. “Starch analysis of teeth, which, unlike other archaeobotanical techniques, provides direct evidence of plant consumption, should greatly improve our ability to address other important questions in human dietary change relating to even earlier time periods,” said Piperno.

The results of this study appear online in Proceedings of the National Academy of Sciences, the week of Dec. 1-5, 2008.

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Adapted from materials provided by Smithsonian Tropical Research Institute, via EurekAlert!, a service of AAAS.

Oil And Gas Projects In Western Amazon Threaten Biodiversity And Indigenous Peoples

ScienceDaily (Aug. 14, 2008) — The western Amazon, home to the most biodiverse and intact rainforest left on Earth, may soon be covered with oil rigs and pipelines.

According to a new study, over 180 oil and gas "blocks" – areas zoned for exploration and development – now cover the megadiverse western Amazon, which includes Bolivia, Colombia, Ecuador, Peru, and western Brazil. These oil and gas blocks stretch over 688,000 km2 (170 million acres), a vast area, nearly the size of Texas.

For over three years, researchers from two U.S. non-profit organizations – Save America's Forests and Land Is Life – and scientists from Duke University tracked hydrocarbon activities across the region and generated a comprehensive map of oil and gas activities across the western Amazon. The result is an alarming assessment of the threats to the biodiversity and indigenous peoples of the region.

"We found that the oil and gas blocks overlap perfectly with the most biodiverse part of the Amazon for birds, mammals, and amphibians," said study co-author Dr. Clinton Jenkins of Duke University. "The threat to amphibians is of particular concern because they are already the most threatened group of vertebrates worldwide."

The study also found that the oil and gas blocks are concentrated in the most intact part of the Amazon. Even national parks are not immune; exploration and development blocks cover the renowned Yasuní National Park in Ecuador and Madidi National Park in Bolivia.

"The most dynamic situation is unfolding in the Peruvian Amazon," warned lead author Dr. Matt Finer of Save America's Forests.

The study reports that 64 oil and gas blocks cover approximately 72% of the vast Peruvian Amazon (~490,000 km2 or ~121 million acres), an area much larger than California. All but eight of these blocks have appeared since 2003, when Peru launched a major effort to boost exploration across the Amazon. National parks are off limits to hydrocarbon activities in Peru, but oil and gas blocks do overlap a variety of other types of protected areas.

Many of the oil and gas blocks in the western Amazon overlap titled lands of indigenous peoples and encroach on the territories of indigenous peoples in voluntary isolation. These isolated peoples have chosen to live in the forests without contact with the outside world. They are extremely susceptible to outside illnesses due to lack of natural resistance.

In the second part of the study, the researchers delve into the most cutting policy issues related to oil and gas activities in the Amazon.

The authors highlighted new access roads as the greatest single threat from hydrocarbon development. Roads trigger deforestation, colonization, overhunting, and illegal logging in previously remote areas.

"The elimination of new oil access roads could significantly reduce the impacts of most projects," said Finer, echoing one of the studies' main conclusions.

The analysis points out that the current environmental assessment process is inadequate due to a lack of independence in the review process and a lack of comprehensive analyses of the long-term, cumulative, and synergistic impacts of multiple oil and gas projects across the wider region. The authors stress the need for regional Strategic Environmental Assessments in order to correct this situation.

The study also addresses the complex policy issues related to indigenous peoples.

"The way that oil development is being pursued in the Western Amazon is a gross violation of the rights of the indigenous peoples of the region" said Brian Keane of Land is Life, "International agreements and Inter-American human rights law recognize that indigenous peoples have rights to their lands, and explicitly prohibit the granting of concessions to exploit natural resources in their territories without their free, prior and informed consent."

The authors also detail the growing conflict of hydrocarbon activities slated for the territories of indigenous peoples in voluntary isolation.

Finally, the study highlights the role of the international community. Growing global energy demand is driving the search for more oil and gas in the Amazon and companies from the U.S., Canada, Europe, and China are carrying out most of the development.

"Filling up with a tank of gas could soon have devastating consequences to rainforests, their peoples, and their species" remarked co-author Dr. Stuart Pimm of Duke University.

Ecuador's innovative Yasuní-ITT Initiative is held up as a potentially precedent-setting example of how the global north and south can collaborate on both protecting the Amazon and combating climate change. The initiative is the Government of Ecuador's limited-time offer to keep its largest untapped oilfields unexploited in exchange for financial compensation from the international community.

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Journal reference:

1. Finer et al. Oil and Gas Projects in the Western Amazon: Threats to Wilderness, Biodiversity, and Indigenous Peoples. PLoS One, 2008; 3 (8): e2932 DOI: 10.1371/journal.pone.0002932

Adapted from materials provided by Public Library of Science, via EurekAlert!, a service of AAAS.

Rock Art Marks Transformations In Traditional Peruvian Societies

ScienceDaily (Aug. 6, 2008) — Most rock paintings and rock carvings or petroglyphs were created by ancient and prehistoric societies. Archaeologists have long used them to gain clues to the way of life of such peoples. Certain rock frescos − such as the renowned Lascaux and Chauvet cave paintings or the petroglyphs of Scandinavia and North America − have already yielded substantial information on our ancestors' daily lives.

However, for other regions of the world like Latin America studies are still fragmentary. In Peru, where many sites have already been located, mystery still cloaks the signification and role of these concentrations of cave paintings and petroglyphs. One of these sites, Toro Muerto, in the South of the country, contains over 4000 carved blocks scattered over several dozen hectares.

Discoveries made in different areas of the country over recent years by Peruvian and international researchers are keys to improved understanding of the meaning behind these artistic representations which were realized over a long period from 10 000 BP to the arrival of the first Spanish Conquistadors in the XVIth Century, or even beyond that time, as in the Cuzco area.

Analysis of the distribution and characteristics of these sites brought out a distinction between the art produced in the coastal valleys from that of the Andean Cordillera uplands. The extensive sites with rocks carved in the open air are concentrated mainly on the Pacific facing slopes, whereas the scenes painted in caves or under shelters predominate in the high regions and on the Amazon side.

These preferences as to the supports and techniques used reflect associated ritual practices which are probably rather different. Study of the oldest rock paintings and their dating by indirect methods (carbon 14 dating of remains of in situ burnt charcoal) showed them to be the work of hunter-gatherers who occupied the region between 7000 and 3000 BC The motifs are small and most often painted in red. They depict hunting scenes involving wild camelid species, such as the guanaco, and also human-like silhouettes. The latter are portrayed with animal-like rather than human faces. Such figures are usually armed with sticks, bows or assegais and sometimes carry nets.

The most ancient sites show a predominance of naturalistic representations of dead or wounded animals. However, a second set dated at 4000 to 5000 years BC eulogizes fertility. This time the images are large, drawn with the abdomen enormously swollen, sometimes containing a foetus. This stylistic development, which seems to coincide with the beginnings of animal husbandry in the high upland regions of Peru, appear to symbolize the emergence of pastoralism and the change in man—animal relationships that came along with this practice.

These research studies also brought into relief periods that were quite distinct in terms of stylistic evolution of carved figures. Whereas the most ancient motifs, associated with the rise of the first great Andean civilizations (2500-300 BC) essentially reproduced complex figures bearing high symbolic and spiritual content, depicting mythical, often monster-like, animals and supernatural beings, the later carvings characteristically appear in abundance and testify to a simplification of morphological features. The simplicity and relative abundance of these petroglyphs, which depict animals of the local fauna and also scenes from daily life, suggest a degree of generalization of rock carving practices to further sections of the society.

The largest sites dating from this era, which contain several hundred carved rocks with dozens of motifs, probably played a significant role in societies' cultural and social life, both at local and regional level. Their location, and some of the rituals that took place, may have been linked to areas of production and trade routes of prized commodities such as coca or salt. Other, geographical, factors like the confluence of two rivers or the proximity to communication routes also appear to have significantly influenced the context and purpose of these artistic representations.

A more extensive study of these archaeological sites, still strongly subjected to vandalism and erosion, is paramount. These vestiges testify to the ideological and social changes that occurred over a period of almost 8000 years, and can further understanding of the way of life and beliefs of peoples who were among the New World's first settlers.

Reference: Guffroy, J., New research into rock art in Peru (2000-2004), In :G. Bahn, A. Fossati (eds), Rock art studies. News of the world III, 2008, Oxbow: p 239-247

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Adapted from materials provided by Institut de Recherche Pour le Développement, via EurekAlert!, a service of AAAS.