North America used to be crawling with giant mammals, from dire wolves to big cats. Horses and camels evolved on the continent while others, like bison, crossed over from Asia. Most of these mammals ...

The elusive big cats vanished from the northeastern U.S. nearly 100 years ago, but their western cousins may be expanding their range.

It went extinct at the end of the Ice Age the same time when a lot of its other prey did, he said. "So you have like the woolly mammoth, woolly rhinos, large North American horses, they all went ...

On the other hand, some scientists say the eastern cougar never went extinct, because it never existed in the first place. The previously recognized North American cougar subspecies may have just ...

While the eastern cougar was previously listed as extinct back in 2011 following an extensive review, the service has now ruled definitively that the so-called “ghost cat” is gone for good.

The ancient sabretooth is not directly related to modern day cats, according to a new DNA analysis. Large cats such as the sabretooth roamed North and South America toward the end of the last Ice ...

Lions prowled North America for tens of thousands of years before going extinct. Today, no lions lounge in southern Alberta canola fields or chase prey through Yukon grasslands—so what happened?

The damage on the extinct cat’s teeth indicated that it eschewed chewing on bones. Yet many American lion specimens – about 36% of those found so far – have broken canine teeth.