image courtesy of Chris Henry unsplash How to protect Earth from incoming asteroids, according to experts “Should they strike, each of them has an energy at impact equal to all of the nuclear weapons on Earth combined.” HARD SCIENCE — NOVEMBER 9, 2021 In February of 2013, skywatchers around the world turned their attention toward asteroid 2012 DA14, a cosmic rock about 150 feet (50 meters) in diameter that was going to fly closer to Earth than the spacecraft that bring us satellite TV. Little did they realize as they prepared for the once-in-several-decades event that another bit of celestial debris was […]