Adrenaline Lab: Bear Grylls - The HALO Jump
Bear Grylls discusses his 30,000 feet free-fall with Jeff Wise, an expert on fear and adrenaline.
Most Watched in Outdoor Activities
The Iditarod: Dog Sledding Controversy
There is a substantial amount of controversy surrounding the annual Iditarod dog sledding race and the treatment of its animal athletes. Watch this video to learn all the details.
The Iditarod: Dog Sledding Check Up
Before embarking on the Iditarod, all the dogs have to get a detailed check up to make sure they are up to the 1100 mile race. Witness the doggy inspection in this video.
Swamp Brothers: Leopard Bait
Robbie and Stephen help a vet team care for a sick female leopard, but Stephen will have to act as bait to draw the angry male away from his mate.
Adrenaline Lab: Jeff Wise
Jeff Wise is a science writer, outdoor adventurer, and author of "Extreme Fear." He explains to Bear Grylls exactly what's happening to the body during the adrenaline rush.
Some Assembly Required: Boat Skin Coat
When constructing a boat, a skin coat of fiberglass is the first step in keeping the boat durable and strong. Learn more about boat construction on Discovery Channel's "Some Assembly Required."
How It's Made: Aluminum Boats
In this clip from The Science Channel's "How It's Made," find out how lightweight, energy efficient aluminum boats are made.
Iditarod Insider: Science of Poop
Erica McKenzie is following behind the dogs, literally. She's collecting poop for science! Learn more about the science of poop in this video from the Discovery Channel's "Iditarod Insider."
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North Woods Law: Daring Moose Rescue
The wardens get a call about a moose who has been stuck in a mud pit overnight and they race in to action. Can they save the animal before it is too late?
North Woods Law: Off the Grid and In Trouble
A local man gives the wardens and the local police trouble about dumping his trash in a local water source. He takes things to the extreme when he calls 911 to report that he is under siege by local law enforcement.