The Cretaceous Period lasted for nearly 80 million years. ... Back then Earth was a lot warmer than it is today and there was little or no ice at the North Pole or South Pole. Sea levels fluctuated ...

An ant and fly from the Cretaceous period offer insights into the history of Ophiocordyceps, the fungal parasite made popular ...

During this period, oceans formed as land shifted and broke out of one big supercontinent into smaller ones. Learn more about Earth's Cretaceous period from National Geographic. 1 of 10 ...

Discover why Antarctica no longer has lush forests with giant ferns and how ancient fires fueled intense volcanic activity.

The Cretaceous period is one of the most crucial times in the Earth’s evolution. The division of the supercontinent, Pangaea, into Laurasia and Gondwana resulted in more diversity among animals ...

The Cretaceous, the last and longest period of the dinosaur age, lasted from about 145.5 million to about 65.5 million years ago. During the Cretaceous, mammals were small, about rat size, and the ...

Twin calamities marked the end of the Cretaceous period, and scientists are presenting new evidence of which drove one of Earth’s great extinctions. By Lucas Joel Some 66 million years ago ...

For years, scientists have thought that a continental ice sheet formed during the Late Cretaceous Period more than 90 million years ago when the climate was much warmer than it is today. Now ...

The Cretaceous, the last and longest period of the dinosaur age, lasted from about 145.5 million years ago to about 65.5 million years ago.