Long ago, Earth had animals that looked, moved, and lived very differently from those seen today. Some were gentle. Some were curious. Some trusted humans too easily. Sadly, a few of them disappeared ...

The late 1900s were a time of rapid change for our planet, and unfortunately, some of its most unique inhabitants did not survive. Between the 1980s and 1990s, several animal species disappeared ...

Some extinct mammals from Australia's Mammoth Cave included (from left) a giant long-nosed echidna, a short-faced kangaroo, a wombat-like marsupial and a Tasmanian thylacine. - Peter Schouten Recent ...

Bill Wasik and Monica Murphy's new book offers a history of the moral revolution on behalf of animals and ask us to honor the obligations we have to all our kindred creatures.

Add Yahoo as a preferred source to see more of our stories on Google. Some extinct mammals from Australia's Mammoth Cave included (from left) a giant long-nosed echidna, a short-faced kangaroo, a ...