Swipe Down for Full Video Story For more than 66 million years, Earth has been living through a remarkable chapter of history ...

Mammal species diversified more rapidly early in their history – peaking roughly 66 million years ago – before a long-term decline in diversification punctuated by diminishing bursts of evolutionary ...

A new marsupial-like carnivorous animal that lived more than 40 million years ago in what is now Turkey may have evolved in the absence of competition from placental mammals, according to a study ...

Yellowstone contains some of North America's most amazing fossil deposits. One of the most dynamic, transformative, and potentially dangerous features in North America is also responsible for some of ...