The Truth About Cold Water Plunges, According to Science

Here's what you need to know before your New Year's Day Polar Bear Plunge.

View in Browser  SHOP EXCLUSIVE SUBSCRIBE The Truth About Cold Water Plunges, According to Science Here's what you need to know before your New Year's Day Polar Bear Plunge. Read More Scientists Built the Battery That Will Finally Unlock Massless Energy Storage It could revolutionize electric vehicles and aircraft. Read More Our Best Value Jackery Portable Power Station Is $250 Off Right Now The discounted Explorer 1000 v2 ran a fridge for more than 18 hours in our testing. Read More The Results Are In: These Are Best Products We Tested in 2024 Of everything we got our hands on this year—tools, tech, gear, and more—here's a shortlist of our favorites. Read More Archaeologists Found 115,000-Year-Old Human Footprints Where They Shouldn't Be They might just rewrite the history of human migration. Read More Scientists Might Know How to Solve Stephen Hawking's Black Hole Information Paradox Gravitational waves could help us crack the case. Read More Need Assistance? Contact Us. Follow Us Unsubscribe | Privacy Notice | CA Notice at Collection Popular Mechanics is a publication of Hearst Magazines. ©2025 Hearst Magazine Media, Inc. All Rights Reserved. This email was sent by Hearst Magazines, 300 West 57th Street, New York, NY 10019-3779