Two Black Holes Smashed and Completely Changed What We Know About the Universe

Scientists are trying to make sense of this physics-altering collision. If you have trouble reading this message, view it in a browser.       Two Black Holes Smashed and Completely Changed What We Know About the Universe   Scientists are trying to make sense of this physics-altering collision. Read More           Russia's Sunken Nuclear Submarines Are a Chernobyl in Slow Motion   There's radioactive fuel hanging at the bottom of the sea. What could go wrong? Read More             Your Ultimate Grill Buying Guide—Tested and Approved   These are the 22 best charcoal, gas, and pellet grills available right now. Read More           Science Confirms the Megalodon Was Just So, So Big   The largest shark to have ever lived was even larger than we thought. (It had a 15-foot-long head!) Read More           The Air Force Isn't Dominant Anymore ... Says Air Force Chief of Staff   The top officer warns of World War II-level casualties against China or Russia if the U.S. doesn't act fast. Read More           How Archaeologists Are Hunting History from Space   This story is exclusive to Pop Mech Pro members.   Racing against war, human migration, and tomb-raiders, these scientists use satellites to find undiscovered ruins. Read More         Read More on PopularMechanics.com       Follow Us     Unsubscribe  Privacy Notice   PopularMechanics.com ©2020 Hearst Communications Inc. All Rights Reserved. Hearst Email Privacy, 300 W 57th St., Fl. 19 (sta 1-1), New York, NY 10019