From super-sized natural wonders and man-made marvels to some of the weirdest, creepiest and teeny-tiniest sights, we take a ...

Little is known about why the woolly rhinoceros went extinct around 14,000 years ago. Scientists have found clues in an unusual source: the frozen remains of an ice age wolf.

Learning how pronghorn survived the climate changes that ended the ice ages anddrove so many other large mammals to extinction can help us adapt to our ownchanging climate.