We're often advised to "kick back," "chill out," or "slow down" when summer begins, as well as other reminders to savor the year's most golden stretch in an easygoing, unstressed sort of way. Stream ...

A giant ground sloth tooth and other Ice Age era animal remains were discovered during a road project in Lubbock, Texas. The remains, estimated to be 18,000-36,000 years old, are being preserved and ...

An Ice Age giant was tumbling around North America during the Late Pleistocene. About the size of a bear, it was actually a kind of enormous sloth that had evolved to thrive in freezing conditions.