Fossilized feces date from 66 million years ago and would be from a young "Tyrannosaurus rex" or a "Nanotyrannus".The finding could determine one of the causes of the selectivity of mass extinction at the end of the Cretaceous.
(Dan Tri Newspaper) - Feathers found in dinosaur fossils provide more data about ancient birds and the possibility that some bird species survived the mass extinction event 66 million years ago.