A Mysterious Network of Tunnels Were Once Dug Beneath Europe—And Scientists May Finally Know Why

Some suggest these passageways once had a spiritual or religious function, while others claim they're relics of long-departed aliens.

View in Browser  SHOP EXCLUSIVE SUBSCRIBE A Mysterious Network of Tunnels Were Once Dug Beneath Europe—And Scientists May Finally Know Why Some suggest these passageways once had a spiritual or religious function, while others claim they're relics of long-departed aliens. Read More Archaeologists Uncovered a Community Lost to Time for 5,000 Years This changes everything we knew about African 'prehistory.' Read More 129 People Died in a Doomed Polar Expedition 178 Years Ago. One of the Victims Was Just Identified. James Fitzjames has been found, largely thanks to DNA analysis and a TV show superfan. Read More Scientists Just Spotted Evidence of 'Negative Time' But don't dust off the DeLorean quite yet. Read More These Are the Best Handheld Spotlights for Your Emergency Supply Kit Compact yet powerful models for situations that require a bigger, brighter beam than a standard flashlight. Read More This Could Be the Closest We've Ever Been to Detecting Dark Matter If these signals are confirmed, one team of scientists says that dark matter decay "remains the most reasonable explanation." Read More Need Assistance? Contact Us. Follow Us 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