An asteroid at the end of the Cretaceous Period ended the dinosaurs, but earlier smaller extinctions dramatically set the ...

When we think of the age of dinosaurs, we often picture huge reptiles like Tyrannosaurus rex or long-necked dinosaurs ...

So many extinction-level events happened in ancient times, it is a wonder anything survived. These the ones that killed the ...

The Mesozoic Era can be subdivided into three periods, namely the Triassic, the Jurassic, and the Cretaceous ... groups of animals and plants. During the first period of the Mesozoic Era (Triassic ...

According to George, the Central Valley is home to a number of significant fossil finds—including California's state dinosaur ...

The massive fossil is suspected to belong to one of the most complete skeletons in the area, portions of which were discovered in the 1970s.

Some grew larger and specialized in eating plants—a ... of the land. The Cretaceous Period, lasting from about 145 to 66 million years ago, was the end of the Mesozoic Era.

“While the dinosaurs ruled the land, these Mesozoic-era oceans were likely the most ... one of the largest and last mosasaurs during the Cretaceous period. Its size, coupled with its agility ...