'Dawn runner' casts light on birth of the dinosaurs

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'Dawn runner' casts light on birth of the dinosaurs

Scientists have unveiled one of the earliest dinosaurs yet found, an agile meat-eater from the late Triassic period, some 230 million years ago.

Researchers writing in the journal Science say Eodromaeus or "dawn runner" was a small, two-legged creature of not much more than 1.2m in length and 4-6kg in weight.

They reconstructed the dinosaur, a probable ancestor of Tyrannosaurus rex, from an almost complete set of bones found in the Valley of The Moon, in northwestern Argentina...

Nice animation of building the musculature of the head.