Dinosaurs Joined Early
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The fossils of six young dinosaurs found together in a ânurseryâ in northeast China show that these animals had started forming social groups much earlier than previously thought.
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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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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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CLEVELAND - A new dinosaur species was a plant-eater with yard-long horns over its eyebrows, suggesting an evolutionary middle step between older dinosaurs with even larger horns and the small-horned creatures that followed, experts said.
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A UK-African team describes a new primitive dinosaur species from the Late Triassic - about 210 million years ago.
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Mammals took to the skies at least 70 million years earlier than previously thought, scientists say.
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The earliest known relative of the mighty Tyrannosaurus rex had primitive feathers, probably to help it keep warm.
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A newly discovered fossil may be the remains of one of the first stealth hunters, a swimming dinosaur that could use its long neck to sneak up on prey and strike without warning.
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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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Archaeopteryx, the earliest known bird, used both its feathered forelimbs and hind limbs to glide from trees, according to a new analysis of fossils found in the 1800s.
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Researchers find evidence that dinosaurs reached sexual maturity earlier than believed.
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Just one week after finding feathers on the ancestor of Tyrannosaurus rex, Chinese and US scientists have announced the discovery of a dinosaur curled up like a sleeping cygnet.
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The earliest evidence for the existence of reptiles is found in  rocks dating back 315 million years.
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Two major classes of dinosaurs show genomes distinctly aligned with modern birds, reptilesCAMBRIDGE, Mass.
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A fossil unearthed in China may provide a first look at dinosaurs&#39; bird-like sleep. Xu Xing, of the Chinese Academy of Sciences, and Mark Norell, of the American Museum of Natural History, said in a report
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WASHINGTON -- The fossil of what may be one of the earliest baby birds has been found in northeast China. The fossil, estimated at 121 million years old, is curled up as though still in its shell.
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A huge collision in space 160 million years ago set the dinosaurs on the path to extinction, a study claims.