Our Universe is Held Together By Invisible Galactic Glue—And We Wouldn’t Exist Without It

Scientists say new research about its origins could "solve a puzzle that spans the entire universe."

View in Browser  DIGITAL ISSUES GEAR REVIEWS SUBSCRIBE Our Universe is Held Together By Invisible Galactic Glue—And We Wouldn't Exist Without It Scientists say new research about its origins could "solve a puzzle that spans the entire universe." Read More Jackery's Top Portable Power Stations Are Now Up to 46% Off. These Post-Prime Day Deals Won't Last. Save up to 46% on Jackery's portable power stations, perfect for emergencies, camping, or off-grid setups. Read More There Are 5 Sleep Personalities, Scientists Say. Yours Could Be Making You Exhausted. These five profiles—including general poor sleep, interrupted sleep, and sleep assisted with medical aids—strengthen the physical and mental connections between our waking and sleeping hours. Read More Sherpa Lining Is the Secret Ingredient for Winter Comfort. Here's Why Everyone Wants It. Sherpa and high-pile fleece lining are the coziest outerwear options. Read More Scientists Found 'Fingerprints' in Hailstones That May Overturn the Simple Truths of Weather How these dastardly balls of ice formed has eluded us—until now. Read More The Earth Is Getting Darker. That's Not Good News. That could be a serious problem for trying to cool our planet. Read More Need Assistance? Contact Us. Follow Us Unsubscribe | Manage Preferences | 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