Like HowStuffWorks on Facebook!

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.


Most Watched in Outdoor Activities

Most Watched in Outdoor Activities
2:02

Moonshiners: A Missing Tickle

Most Watched in Outdoor Activities
2:43

Moonshiners: Goodbye Popcorn

Most Watched in Outdoor Activities
2:07

Swamp Wars: One Aggressive Crocodile

Most Watched in Outdoor Activities
2:37

Swamp Wars: Snake Trapped in Fence

Most Watched in Outdoor Activities
1:51

Flying Wild Alaska: Ariel's First Solo Flight

Most Watched in Outdoor Activities
1:33

Flying Wild Alaska: One Tough Landing

Most Watched in Outdoor Activities
2:01

Flying Wild Alaska: Ariel On Approach

Most Watched in Outdoor Activities
1:25

Ragin Cajuns: Kip's Big Decision

Most Watched in Outdoor Activities
1:41

Hillbilly Handfishin: Vegas Showgirl Gets Hands Dirty

Most Watched in Outdoor Activities
2:45

Swamp Wars: Python Regurgitates Bird

Most Watched in Outdoor Activities
1:29

Moonshiners: Law Comes Knockin

Most Watched in Outdoor Activities
2:48

Flying Wild Alaska: Ariel Gets Her Tails


Recent Videos in Outdoor Activities

Recent Videos in Outdoor Activities
2:21

Deadliest Catch: Difficult Ditch

Recent Videos in Outdoor Activities
2:26

North Woods Law: Moose Poachers Caught

Recent Videos in Outdoor Activities
2:32

North Woods Law: Daring Moose Rescue

Recent Videos in Outdoor Activities
3:41

North Woods Law: Off the Grid and In Trouble

Recent Videos in Outdoor Activities
2:30

North Woods Law: Frantic Water Rescue

Recent Videos in Outdoor Activities
2:44

North Woods Law: How to Do a Moose Mating Call

Recent Videos in Outdoor Activities
2:51

Deadliest Catch: Captains Roundtable

Recent Videos in Outdoor Activities
2:15

Deadliest Catch: Kiss From the Bering Sea

Recent Videos in Outdoor Activities
3:58

Deadliest Catch: Crab War

Recent Videos in Outdoor Activities
2:03

Deadliest Catch: Not Ready for Primetime

Recent Videos in Outdoor Activities
1:29

Deadliest Catch: Pranking The Bandit

Recent Videos in Outdoor Activities
2:04

Physician Ed: Diabetic Macular Edema