Autonomous Underwater Warfare Is Here—And America Is Fighting to Keep Up With North Korea

Underwater unmanned vehicles with nuclear payloads pose the danger of a “radioactive tsunami,” which could wipe out coastal cities. [View in Browser]( [Popular Mechanics]( [SHOP]( [EXCLUSIVE]( [SUBSCRIBE]( [Autonomous Underwater Warfare Is Here—And America Is Fighting to Keep Up With North Korea]( [Autonomous Underwater Warfare Is Here—And America Is Fighting to Keep Up With North Korea]( Underwater unmanned vehicles with nuclear payloads pose the danger of a “radioactive tsunami,” which could wipe out coastal cities. [Read More]( [Alternate text] [Alternate text] [Archaeologists Entered an Ancient Building—and Found 15 Abandoned Skulls Under the Floor]( [Archaeologists Entered an Ancient Building—and Found 15 Abandoned Skulls Under the Floor]( They may have been part of a mysterious ritual. [Read More]( [A Seismic New Semiconductor Could Lead to the Holy Grail of Data Storage]( [A Seismic New Semiconductor Could Lead to the Holy Grail of Data Storage]( It requires 1 billion times less energy than our current systems. [Read More]( [Alternate text] [Alternate text] [These Stocking Stuffer Ideas Are Great for Dads, Husbands, and Grandpas]( These Stocking Stuffer Ideas Are Great for Dads, Husbands, and Grandpas]( Don’t overlook those small, practical gifts. [Read More]( [The Best Home Generators Help You Weather Any Storm]( [The Best Home Generators Help You Weather Any Storm]( Keep your fridge and home essentials running no matter what with these home generators. [Read More]( [Alternate text] [Alternate text] [Archaeologists Found a Mysterious Half-Body Statue Hiding in a Sacred Hot Spring]( [Archaeologists Found a Mysterious Half-Body Statue Hiding in a Sacred Hot Spring]( The “exceptional” body was severed as if from a surgical cut. [Read More]( [Alternate text] [90-Day Transformation Challenge: Abs]( [LiveIntent Logo]( [AdChoices Logo]( [Need Assistance? Contact Us.](mailto:pmpmembership@popularmechanics.com) Follow Us [Visit Popular Mechanics on Facebook]( [Visit Popular Mechanics on X formerly Twitter]( [Visit Popular Mechanics on Instagram]( [Visit Popular Mechanics on YouTube]( [Unsubscribe]( | [Privacy Notice]( | [CA Notice at Collection]( Popular Mechanics is a publication of Hearst Magazines. ©2024 Hearst Magazine Media, Inc. All Rights Reserved. This email was sent by Hearst Magazines, 300 West 57th Street, New York, NY 10019-3779