Study: Dinosaurs, ancestors coexisted
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Dinosaurs shared the Earth for millions of years with the species that were their ancestors, a new study concludes. Dinosaurs arose in the Late Triassic, between 235 million and 200 million years ago, and came to dominate the planet in the Jurassic, 200 million to 120 million years ago.
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Is it possible to outrun evolution? Two new lizard-behavior studies look at why it's not always just the fittest that survive.
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As a paleontologist and a creationist, Marcus R. Ross embodies the conflicts between the two approaches.
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Fossils from two newly discovered  meat-eating dinosaurs that lived in the Sahara Desert 110  million years ago paint a fearsome picture of life in Africa's  Cretaceous period, which appears to have been teeming with  unusual carnivores.
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RIO DE JANEIRO, Brazil  - Scientists have found  well-preserved fossils of a new dinosaur species that lived 225  million years ago in southern Brazil but had its closest  relatives in what is now Europe, Brazilian paleontologists said  on Thursday.
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The discovery suggests that the care that crocodiles, birds, and other modern descendents of archosaurs give to their young may be an ancestral characteristic.
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Two previously unknown types of meat-eating dinosaur have been identified from Sahara desert fossils.
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There&#39;s a new storm in the ranks of anthropologists who try to understand the long and puzzling history of human evolution by studying fossil evidence from millions of years ago.
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A new fossil discovery from China shows that a tiny squirrel-like creature glided through the air during the age of dinosaurs, more than 75 million years earlier than scientists had documented that ability in a mammal.
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Were early mammals timid creatures suitable only for eating? Not all of them, suggest two remarkable fossils from China
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A new species of duck-billed dinosaur unearthed in Mexico is helping scientists fill in gaps in the fossil record of the Age of Dinosaurs.
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Fossils found in the United States show dinosaurs lived along side their ancestors for tens of millions of years, disproving long-held theories assuming they quickly replaced their predecessors, according to a new study.
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The remains of a giant, birdlike dinosaur as tall as the formidable tyrannosaur have been found in China, a surprising discovery that indicates a more complicated evolutionary process for birds than originally thought, scientists said Wednesday.
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The ancient family tree where all the world&#39;s birds perch is getting bigger, odder and older, scientists announced Wednesday. In a report in Thursday&#39;s issue of the journal Nature, paleontologists
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A CT scan of dinosaur bones from northwest Wyoming could help resolve a dispute about the great Tyrannosaurus rex.
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Villagers in central China spent decades digging up bones they believed belonged to flying dragons and using them in traditional medicines. Turns out the bones belonged to dinosaurs, and now scientists are doing the digging.
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Scientists say they have found a small, earlier cousin of Tyrannosaurus rex that had at least a partial coat of feathers. Includes image gallery.