[resources: Michael Brown retreats: Michigan and Virginia]

And of course asteroids.

From Fox News:

A football-sized asteroid – labeled 2018 GE3 – buzzed by Earth on April 16, 2018.

An asteroid the size of a football field buzzed by Earth Sunday in one of the closest encounters the planet has seen in a while.

At its closest point, the asteroid – called 2018 GE3 – was just 119,500 miles away from Earth’s atmosphere, about half the distance between Earth and the moon, according to NASA’s Center for Near Earth Object Studies (CNEOS). The estimated diameter of the space rock ranged from 131 to 328 feet, CNEOS reports. That’s nothing compared to asteroids that make up the asteroid belt between Mars and Jupiter, which can measure to about 580 miles across, NASA explains on its website. Those asteroids, however, pose no threat to Earth.