Fierce T. rex's 'fluffy' history
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Chinese scientists unearth the earliest known relative of the mighty Tyrannosaurus rex - and it seems it was covered in fluffy feathers.
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Fossilized foot marks left by a big  meat-eater on a lake bed in northern Spain 125 million years  ago provide strong evidence that at least some dinosaurs were  good swimmers, scientists said on Thursday.
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For big beasts, dinosaurs like  Tyrannosaurus rex sure had small genomes.
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The dwarf ancestors of today&rsquo;s giant pandas were already big-time bamboo munchers more than 2 million years ago, a new fossil skull reveals.
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The bizarre-looking, 78-million-year-old dino had horns as large as human arms, and its skull was frilled with spikes the size of sharks' teeth.
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Fossilized dinosaurs often have wide-open mouths, heads thrown back and tails that curve toward the head. Paleontologists have long assumed the dinosaurs died in water and the currents drifted the bones into that position, or that rigor mortis or drying muscles, tendons and ligaments contorted the limbs.  &quot;I&#39;m reading this in the literature and thinking, &#39;This doesn&#39;t make any sense to me as a veterinarian,&#39;&quot; said Cynthia Marshall Faux, a veterinarian-turned-paleontologist at the Museum of the Rockies. ...
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Scientists have found the remains of a dinosaur in a fossilized mammal's stomach, a discovery that upends decades of scientific belief about the relationship between dinosaurs and mammals.
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A frog the size of a bowling ball, with heavy armor and teeth, lived among dinosaurs millions of years ago Â intimidating enough that scientists who unearthed its fossils dubbed the beast Beelzebufo, or Devil Toad.
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Paleontologists from Argentina and Brazil on Monday unveiled a new giant dinosaur species that lived 88 millions of years ago in the Patagonia region of Argentina, where they found its fossils.
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The web video "Battle at Kruger," in which a baby buffalo is rescued by its herd from a lion attack, is less surprising to animal behaviorists than to its millions of Web fans
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The fossils of feathered dinosaurs whose discoveries helped firm hypotheses on the origin of birds will be exhibited publicly in the U.S. for the first time this weekend.
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Large, carnivorous dinosaurs roamed  southern Australia 115 million years ago, when the continent  was joined to the Antarctica, and were padded with body fat to  survive temperatures as low as minus 30 degrees Celsius.
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Tyrannosaurus rex achieved its massive size due to an enormous growth spurt during its adolescent years.
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A popular view that the Triassic dinosaur Coelophysis was a cannibal may be misplaced, a study concludes.
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The dinosaurs might have gone out with a sudden bang, but their rise to dominance was a gradual ascent, experts say.
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The Tyrannosaurus rex would have been able to outrun soccer star David Beckham, according to research published Wednesday by the Royal Society scientific academy.
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A fossil unearthed in China gives scientists a rare glimpse of what dinosaurs were like "in the flesh".