Birds evolved from theropod dinosaurs during the Late Jurassic period, however, our knowledge of the initial stages of Avialae's evolution is limited due to a scarcity of Jurassic fossils.
A new study suggests that predatory dinosaurs, such as Tyrannosaurus rex, did not have permanently exposed teeth as depicted in films such as Jurassic Park, but instead had scaly, lizard-like lips covering and sealing their mouths.
A study led by The University of Texas at Austin is providing a glimpse into dinosaur and bird diversity in Patagonia during the Late Cretaceous, just before the non-avian dinosaurs went extinct.
A breakthrough discovery has found that pterodactyls, extinct flying reptiles also known as pterosaurs, had a remarkable ability - they could fly from birth.
Scientists have solved the evolutionary puzzle of how sloths went from enormous ground-dwelling giants to the small, famously-laidback tree-climbers of the modern day.
Researchers have for the first time detected chemical traces of red pigment in an ancient fossil - an exceptionally well-preserved mouse, not unlike today's field mice, that roamed the fields of what is now the German village of Willershausen around 3 million years ago.
Researchers have used fossilized teeth found near Lake Turkana in northwest Kenya to identify a new monkey species -- a discovery that helps fill a 6-million-year gap in primate evolution.