Asteroid Threat: Multiple Impacts Predicted for Earth's Future.

Six asteroids have been identified as having the potential to hit Earth in the coming centuries, with the most likely to hit being 2010RF12, which has a one-in-ten chance of hitting Earth. However, it is only around 21 feet in diameter and is expected to explode in the upper atmosphere. The largest asteroid, Bennu, is more than 4.5 billion years old and has a one-in-2,700 chance of impacting Earth during the late 22nd century. NASA and other space agencies closely monitor 'Potentially Hazardous Asteroids' and have classified them by their risk of hitting Earth.