Extinction-Level Asteroid Impact
Some apocalypse theorists believe that the end of life on Earth won’t come from anything we do. Instead, it’ll happen because of the random dance of celestial objects. In 1994, the comet Shoemaker-Levy collided with Jupiter, causing massive fireballs as large as 3,700 miles in diameter. Many theorize that the extinction of the dinosaurs was caused by a rock just six miles wide striking the Earth, and to wipe out our world it would take an asteroid a sixth of the size. Thankfully, astronomers haven’t identified any of that size, but there’s a 300-yard wide one that will hit our orbit in 2029 and could conceivably kill millions.