A mummified dinosaur, unwrapped from the rocks of Montana, has revealed how the creature looked and how it lived 77 million years ago — down to the texture of its skin and the contents of its stomach, scientists say. THE DUCKBILL DINOSAUR, nicknamed Leonardo, was fossilized in an unusual way, its discoverers reported Thursday at the Society of Vertebrate Paleontology’s annual meeting in Norman, Okla. Only a handful of such dinosaur mummies are known to exist, they said.
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Tiktaalik is an extinct lobe-finned fish from the late Devonian period, with many features akin to those of four-legged animals. The Tiktaalik is understood as representative of the evolutionary transition from fish to amphibians. It is an example from several lines of ancient fish developing adaptations to the oxygen-poor shallow-water habitats of its time. The Tiktaalik is understood to be the common ancestor of a wide swathe of all terrestrial fauna: amphibians, reptiles, birds, and…
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