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It might seem counterintuitive, but tropical forest soils are, almost universally, terrible for farming. That’s due primarily to the insanely dense amount of life in these environments: In less alive forests, dead plant and animal matter has time to decompose and leach its nutrients into the soil. But in the tropical forest, huge numbers of insects, fungi, and bacteria devour any decomposing matter before it has a chance to enrich the soil. But people around the world live in tropical forests, and have had to figure out some way to make the soil actually productive. (The effects of the destruction...

As early as 9,500 years ago, people in Europe used slash-and-burn methods to make land usable for agriculture. This is shown by environmental data generated by scientists from the Senckenberg Center for Human Evolution and Paleoenvironment (S-HEP) at the University of Tübingen on the basis of two drill cores from the Ammer Valley. The data were then correlated with results from the Mesolithic scattered finds from Rottenburg-Siebenlinden excavated by the Baden-Wuerttemberg Landesamt für Denkmalpflege (State Office for Monument Preservation). In their study, published in the Journal of Quaternary Science, the scientists investigate to what extent climate or anthropogenic factors played...

New bioarchaeological research shows malaria has threatened human communities for more than 7000 years, earlier than when the onset of farming was thought to have sparked its devastating arrival..."Until now we've believed malaria became a global threat to humans when we turned to farming, but our research shows in at least Southeast Asia this disease was a threat to human groups well before that."This research providing a new cornerstone of malaria's evolution with humans is a great achievement by the entire team," Dr Vlok says...While malaria is invisible in the archaeological record, the disease has changed the evolutionary history of...

'First Americans were Australian' This is the face of the first known American, Lucia The first Americans were descended from Australian aborigines, according to evidence in a new BBC documentary. The skulls suggest faces like those of Australian aborigines The programme, Ancient Voices, shows that the dimensions of prehistoric skulls found in Brazil match those of the aboriginal peoples of Australia and Melanesia. Other evidence suggests that these first Americans were later massacred by invaders from Asia. Until now, native Americans were believed to have descended from Asian ancestors who arrived over a land bridge between Siberia and Alaska and...

Ancient hearth tests carbon dating Bob Beale ABC Science Online Monday, 17 November 2003 Rock art at Serra da Capivara National Park, home of the Pedra Furada site in Brazil (Embassy of Brazil, London) People were keeping warm by a fire in a rock shelter at least 56,000 years ago, according to new analysis of what may be the oldest known human record in the Americas. This is about 40,000 years earlier than generally agreed for when people first arrived in the Americas. The international team of researchers dated charcoal from a hearth at the controversial Pedra Furada archaeological site...

Genetic analysis of plant species has long pointed to the lowlands of southwest Amazonia as a key region in the early history of plant domestication in the Americas, but systematic archaeological evidence to support this has been rare. The new evidence comes from recently-exposed layers of the Teotonio archaeological site, which has been described by researchers as a "microcosm of human occupation of the Upper Madeira [River]" because it preserves a nearly continuous record of human cultures going back approximately 9,000 years. In this study, Watling and colleagues analyzed the remains of seeds, phytoliths, and other plant materials in the...

Forget small nomadic tribes and pristine jungle: the southern Amazon was likely covered in a network of large villages and ceremonial centers before Columbus. Geoglyphs in the southern Amazon are evidence of a once-thriving population. Photograph courtesy of University of Exeter ------------------------------------------------------------------------------------------------------------------------ Before Spanish invaders conquered South America, sparse groups of nomadic people clustered around the Amazon River, leaving the surrounding rain forest pristine and untouched. Or did they? New research suggests a very different story—an Amazonian region peppered with rain forest villages, ceremonial earthworks, and a much larger population than previously thought. The research, funded in part by the...

Sediment column at the mouth of the Amazon River. Credit: NASA The Amazon River has been around for 11 million years ago and in its shape for the last 2.4 million years ago, according to a study on two boreholes drilled in proximity of the mouth of the Amazon River by Petrobras, the national oil company of Brazil. Until recently the Amazon Fan, a sediment column of around 10 kilometres in thickness, proved a hard nut to crack, and scientific drilling expeditions such as Ocean Drilling Program could only reach a fraction of it. Recent exploration efforts by Petrobras lifted...

The unifying feature behind all of these characteristics is a cultural restriction against talking about things that extend beyond personal experience. This restriction counters claims of linguists, such as Noam Chomsky, that grammar is genetically driven system with universal features. Despite the absence of these allegedly universal features, the Pirahã communicate effectively with one another and coordinate simple tasks. Moreover, Piraha suggests that it is not always possible to translate from one language to another.

Contact: Dr. Dolores Pipernopipernod@tivoli.si.edu 011-507-212-8101Smithsonian Institution An origin of new world agriculture in coastal Ecuador New archaeological evidence points to an independent origin of agriculture in coastal Ecuador 10,000 to 12,000 years ago. Suddenly, the remains of larger squash plants appear in the record. The Las Vegas site, described by Dolores Piperno of the Smithsonian Tropical Research Institute (STRI) and Karen Stothert, University of Texas at Austin in the February 14th issue of Science, may predate plant domestication sites in the Mesoamerican highlands. The fertile and amazingly diverse lowland tropics seem like a likely place for agriculture to develop. But...

It is often held aloft by environmental campaign groups as an example of one of the last remaining regions of unspoiled habitat left in the world. But instead of being a pristine rainforest untouched by human hands, the Amazon appears to have been profoundly shaped by mankind. An international team of researchers have published evidence that suggests the Amazon was once home to millions of people who lived and farmed in the area now covered by trees.

It is often held aloft by environmental campaign groups as an example of one of the last remaining regions of unspoiled habitat left in the world. But instead of being a pristine rainforest untouched by human hands, the Amazon appears to have been profoundly shaped by mankind. An international team of researchers have published evidence that suggests the Amazon was once home to millions of people who lived and farmed in the area now covered by trees.

Carson and his colleagues wanted to explore the question of whether early Amazonians had a major impact on the forest. They focused on the Amazon of northeastern Bolivia, where they had sediment cores from two lakes nearby major earthworks sites. These sediment cores hold ancient pollen grains and charcoal from long-ago fires, and can hint at the climate and ecosystem that existed when the sediment was laid down as far back as 6,000 years ago. An examination of the two cores — one from the large lake, Laguna Oricore, and one from the smaller lake, Laguna Granja — revealed a...

Look around the Amazon rainforest today and it’s hard to imagine it filled with people. But in recent decades, archaeologists have started to find evidence that before Columbus’s arrival, the region was dotted with towns and perhaps even cities. The extent of human settlement in the Amazon remains hotly debated, partly because huge swaths of the 6-million-square-kilometer rainforest remain unstudied by archaeologists. Now, researchers have built a model predicting where signs of pre-Columbian agriculture are most likely to be found, a tool they hope will help guide future archaeological work in the region. In many ways, archaeology in the Amazon...

Previously unknown archeological sites in forest islands reveal human presence in the western Amazon as early as 10,000 years ago, according to research published August 28 in the open access journal PLOS ONE by Umberto Lombardo from the University of Bern, Switzerland and colleagues from other institutions. The study focuses on a region in the Bolivian Amazon thought to be rarely occupied by pre-agricultural communities due to unfavorable environmental conditions. Hundreds of 'forest islands'- small forested mounds of earth- are found throughout the region, their origins attributed to termites, erosion or ancient human activity. In this study, the authors report...

A series of ancient underwater etchings has been uncovered near the jungle city of Manaus, following a drought in the Brazilian Amazon. The previously submerged images -- engraved on rocks and possibly up to 7,000 years old -- were reportedly discovered by a fisherman after the Rio Negro, a tributary of the Amazon river, fell to its lowest level in more than 100 years last month... Though water levels are now rising again, partly covering the apparently stone age etchings, local researchers photographed them before they began to disappear under the river's dark waters. Archaeologists who have studied the photographs...

Many botanists did not see any connection between maize and other living plants. Some concluded that the crop plant arose through the domestication by early agriculturalists of a wild maize that was now extinct, or at least undiscovered. However, a few scientists working during the first part of the 20th century uncovered evidence that they believed linked maize to what, at first glance, would seem to be a very unlikely parent, a Mexican grass called teosinte... George W. Beadle, while a graduate student at Cornell University in the early 1930s, found that maize and teosinte had very similar chromosomes....

To the untrained eye, all evidence here in the heart of the Amazon signals virgin forest, untouched by man for time immemorial - from the ubiquitous fruit palms to the cry of howler monkeys, from the air thick with mosquitoes to the unruly tangle of jungle vines. Archaeologists, many of them Americans, say the opposite is true: This patch of forest, and many others across the Amazon, was instead home to an advanced, even spectacular civilization that managed the forest and enriched infertile soil to feed thousands. The findings are discrediting a once-bedrock theory of archaeology that long held that...

Centuries-old European explorers' tales of lost cities in the Amazon have long been dismissed by scholars, in part because the region is too infertile to feed a sprawling civilization. But new discoveries support the idea of an ancient Amazonian urban network—and ingeniously engineered soil may have made it all possible.

"These data are directly relevant to the resilience of Amazonian conservation, as they do not support the contention that all of Amazonia is a 'built landscape' and therefore a product of past human land use," Bush says. "Most archaeologists are buying into the argument that you had big populations that transformed the landscape en masse. Another group of archaeologists say that transformation was very much limited to river corridors, and if you went away from the river corridors there wasn't that much impact. That's what our findings tend to support." Bush doesn't expect that his new findings will settle the...