There are more nerve cells in the human brain than there are stars in the Milky Way.
349
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
Not only are there rogue planets floating through space completely alone, not orbiting any stars, but it’s possible that these pitch-black lonely planets support life.
14
A comet's tail always points away from the sun.
2
Jupiter is bigger than all the other planets combined.
254
Saturn's moon, Mimas, not only looks like the Death Star, it also has a Pac Man heat signature.
15