Petroglyphs on sandstone at a national park in Chad bear witness to wildlife that once roamed the area before the continent’s ...

By Will Dunham Feb 19 (Reuters) - It was not an easy task for a team of dinosaur-hunting scientists to reach the remote site ...

Experts say a weekslong “snow drought” in Norther California's Sierra Nevada helped set the stage for Tuesday's deadly ...

The reason you don't normally sink into the sand when you go to the beach is due to a physics phenomenon known as force chain. Basically, when a bajillion grains of sand are jammed together in one ...

This combination of an unstable base below a thick layer of unconsolidated fresh snow is one of the most dangerous causes of ...

That’s the recipe that apparently lured 15 skiers into the backcountry northwest of Lake Tahoe, where at least eight of the group died in a catastrophic avalanche, the deadliest in modern California ...