When in its hunting dive, the Peregrine falcon is the fastest bird - in fact, the fastest animal - on Earth. Get a bird's-eye view of the flight in this video.
A geomagnetic storm is a disturbance in Earth's magnetic field, caused by activity on the sun. The current solar cycle number 25 has triggered a few of them.
Snowball Earth might have been more of a slushball, scientists say. More temperate regions with pockets of slushy waters would have allowed life to survive.