The Mesozoic Era extinctions formed the world as we know it today. Read about what caused them and which animals survived.

A rare fossil discovered in Oklahoma is making waves across the paleontological community after a geology professor and his ...

A routine fossil-hunting trip turned into a groundbreaking discovery for a pair of researchers when they stumbled upon a rare ...

The dinosaurs were not in decline before the asteroid hit, a new study finds. Instead, poor fossilization conditions and ...

The model suggested that, during the 18 million-year time period in question ... caused by geological changes in these terminal Mesozoic fossil-bearing layers — driven by processes such as ...

The idea that dinosaurs were already in decline before an asteroid wiped most of them out 66 million years ago may be explained by a worsening fossil record from that time rather than a genuine ...

The study looked at the dinosaur groups Ankylosauridae (armoured herbivores), Ceratopsidae (large three-horned herbivores, ...

In the Mesozoic Era, there are fossils that represent both extinct groups ... All through geologic time there have been extinctions mostly occurring at a fairly stable background rate.