Researchers including a Johns Hopkins University evolutionary biologist report they have analyzed a fossil of an extinct ...
Evolutionary biologist Federico Degrange from Argentina's Center for Research in Earth Sciences and colleagues found the bird ...
It belonged to oversize hoofed mammals like toxodonts, distant relatives of today’s rhinoceroses and tapirs; tall crocodiles ...
The mostly flightless, meat-eating dinosaur descendents were the size of dogs at their smallest, but the largest known ...
A team of researchers analyzed a 12-million-year-old fossilized bone discovered in Colombia's fossiliferous Tatacoa Desert ...