When Bats and Humans Were One and the Same
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Scientists have used computer analysis to read evolution backward and reconstruct a large part of the genome of an 80-million-year-old mammal.
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By RANDOLPH E. SCHMID  WASHINGTON - Chimpanzees may have been using stone "hammers" as long as 4,300 years ago.
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Two  reptile-like animals living 290 million years ago are the oldest creatures to have  their footprints positively identified after a fortuitous discovery  allowed scientists to match fossils to preserved trackways.
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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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Mammals took to the skies at least 70 million years earlier than previously thought, scientists say.
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Chimpanzees may have been using stone "hammers" as long as 4,300 years ago. An international research team, led by archaeologist Julio Mercader of the University of Calgary, Canada, said Monday it had uncovered the hammers, dated to that time, in the West African country Ivory Coast. It would be the earliest known use of tools by chimpanzees.
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Using computer programs,scientists have suceeded in reconstructing the DNA of a creature that lived at the time of the dinosaurs more than 75 million years ago, a small, furry nocturnal animal that was the common ancestor of all placental mammals
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The last probable common ancestor to humans and great apes had a body like an ape, fingers like a chimp and the upright posture of humans, according to researchers who unearthed a fossil of the animal in Spain.
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MAN VERSUS BEAST: Overtrapping and overhunting in the early 20th century drove many species &#151; river otters, black bears and Canada geese, for example &#151; from their natural habitats.
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The latest probable common ancestor to humans and great apes had a body like an ape, fingers like a chimp and the upright posture of humans, according to researchers who unearthed a fossil of the animal in Spain.
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Researchers reported for the first time last week that they have found the virus in a nonprimate species â bats.
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Whale fossils found with tiny ear bones reveal for the first time how the ancestors of whales and dolphins developed their acute underwater hearing.
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Boston players celebrate beating the New York Yankees in game seven of the American League championship series. Photo: AP. They had been reliable caretakers of a cosmic curse, feasting for decades
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Scientists took a fresh look at human evolution through tiny hitchhikers that have clung to humans and their relatives for centuries - lice.
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The story of modern humansâ final interactions with the extinct Homo erectus may have been revealed by research into the evolution of lice.
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Scientists believe that they have reconstructed the pivotal event that created the one-celled organism from which all animals and plants are descended.
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US researchers say humans began endurance running about 2 million years ago to help hunt for prey.