Brown Bears Came to N. America Earlier Than Thought, Fossil ...
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The discovery also sheds light on the ancestry of modern brown bears, which has long puzzled researchers. A genetic analysis of the skull fragment indicates its owner was closely related to the brown bears
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The first skull of the earliest known ancestor of the giant panda was been discovered in China, researchers report. Discovery of the skull, estimated to be at least 2 million years old, is reported by Russell L. Ciochon in Tuesday's edition of Proceedings of the National Academy of Sciences.
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Archaeologists said Wednesday they had found evidence that humans lived in North America at least 50,000 years ago, far earlier than has been thought.
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Agriculture was taking root in South America almost as early as the first farmers were breaking ground in the Middle East, new research indicates. Evidence that squash was being grown nearly 10,000 years ago, in what is now Peru, is reported in Friday's edition of the journal Science.
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Some head lice infesting people today were probably spread to us thousands of years ago by an extinct species of early human, a genetics study reveals.
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MODERN human beings may have wiped out two species of our closest relatives 25,000 years ago, possibly deliberately. The new research, by scientists at the University of Utah, raises the possibility that we
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Penguins were waddling and swimming  in warm locales tens of millions of years earlier than  previously thought, according to scientists who described on  Monday fossils of two previously unknown types found in Peru.
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In a Feb. 13 story about a fossil of a previously unrecognized bat species, The Associated Press reported erroneously when the species lived. The bat species lived about 52 million years ago, not 25.5 million.
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WASHINGTON: Based on recent fossil evidences, American scientists have claimed that a chimp-sized hominid walked upright on two legs in Kenya&#39;s Tugen Hills over six million years ago, nearly three million years earlier than currently believed.
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EXETER, England  - Anthropologists stepped into a  hornets' nest on Monday, revealing research that suggests the  original inhabitants of America may in fact have come from what  is now known as Australia.
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About 2 million years ago, in  lowland tropical forests of what is now China, lived an  ancestor of the giant panda that was very similar to the famed  vegetarian bear except about half the size, scientists said.
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The fossilized remains of six young  dinosaurs found together in a &quot;nursery&quot; at a site in China show  these animals had started forming social groups much earlier  than previously thought, scientists said on Thursday.
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NEW YORK -- During the age of dinosaurs, tiny squirrel-like creatures climbed trees and jumped into the darkness. Then they spread their limbs and glided away -- the first known mammals to take to the air, a new report says.
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A fragment of a bear skull in a Canadian museum may be rewriting the history of North America's brown bears.
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Small deer-like animal that waded in lagoons 10 million years ago may have evolved into whale
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A study of an ancient human pest -- head lice -- suggests that the ancestors of today's American Indians may have met and fought with pre-humans long extinct elsewhere, scientists said on Tuesday.
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North American bison populations suffered a sharp decline long before humans inhabited the continent, indicating that environmental factors, not hunting, wiped out the animals, according to a study published in the journal Science.