DNA shines a light back into the past, showing us things that fossils can't. But how far back can that light extend? Some of the oldest DNA sequences come from mastodon and polar bear fossils about 50 ...

I nudged the horse into the bitterly cold gale force wind, turning my head to keep the blowing snow out of my eyes. A wind greater than 39 mph qualifies as a gale, and this wind clearly made the cut.

I nudged the horse into the bitterly cold gale force wind, turning my head to keep the blowing snow out of my eyes. A wind greater than 39 mph qualifies as a gale, and this wind clearly made the cut.

The American West has a mustang problem There are tens of thousands of wild horses in the western U.S. The federal government rounds thousands of them from public lands each year. Scientists say there ...