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
Sign up to receive the Men’s Journal newsletter and special offers from MJ and its marketing partners.
Gear of the Year
103 Must-Have Gadgets, Tools & Toys
Plus: The Plan to Save Africa's Rhinos
ON NEWSSTANDS NOW