What Happens If An Asteroid ACTUALLY Hits Earth? | FULL DOCUMENTARY

As scientists race to track thousands of near-Earth objects, this episode explores what would happen if a massive asteroid were detected on a collision course with Earth. From global warning systems to last-chance deflection attempts, we uncover how humanity might respond to an impending impact—and what the planet would endure if those efforts failed. ►Subscribe – http://goo.gl/wpc2Q1