The biggest asteroids that have ever hit Earth

via https://ift.tt/UBfDyk0 Our planet had a violent past.

The reality about menacing asteroids coming to destroy Earth in the modern-day is, perhaps surprisingly, not too scary.

Yes, the doomsayers thrive online, but the prognosis is encouraging:

- Astronomers have already found over 90 percent of the half-mile-plus "planet-killer" asteroids that at times pass near Earth's neighborhood, and … The biggest asteroids that have ever hit Earth