Around 10,000 years ago, however, almost all of North America's large mammals went extinct, and horses were not spared.

Fifty thousand years ago, North America's landscapes were alive with an astonishing array of enormous creatures. Massive woolly mammoths roamed vast icy plains, while dense forests echoed with the ...

Virginia opossums are the only marsupial species in North America.

The large, extinct creatures roamed the Twin Cities area more than 10,000 years ago and could grow to more than 200 pounds ...

Isolation allows creatures to thrive as their relatives perish due to the threats present on much larger landmasses ...

In two new studies, researchers at the State University of Campinas (UNICAMP) in the state of São Paulo, Brazil, have shed light on how interactions between predators and prey influenced the ...

New species of extinct walrus discovered in the North Atlantic The extinct walrus Ontocetus posti is believed to have eaten via suction-feeding like modern walruses By Matthew Rozsa Staff Writer ...