The slow, continual shifting of the Earth's crust may have started with a violent asteroid impact. Find out about this new theory.

  Mike Rowe's fans have been busy creating art of their favorite dirty guy. Now you can vote for your favorite.

  See behind-the-scenes video of Bear and crew dealing with the harsh realities of Patagonia. And check out his latest Top Ten list.

  Take a video tour up the mountain. And follow climber David Tait's blog as he tackles an Everest record.

  There's a new Cash Cab Game. Now you can match your wits with other people who think they're so smart.