DARPA's $20 million Preventing Sleep Deprivation (PSD) program aims to find ways for soldiers to stay awake and effective for as long as seven days. Dolphins and whales are providing a promising direction. These mammals survive on something called "hemispheric sleep," a state in which one side of the brain is awake while the other is unconscious.
Credit: Andrew Burton / Getty Images
Powered By ZergNet
Gear of the Year
102 of the Best Tools, Toys & Tech
Plus: The Woman Who Bails Out the NFL's Bad Boys
ON NEWSSTANDS NOW
Joby Ogwyn: The Man Who Fell to Earth
Life Advice from John Cleese
Sign up to receive the Men’s Journal newsletter and special offers from MJ and its marketing partners.