The last time that the Sun was in its current position in space around the Milky Way, dinosaurs ruled the Earth.
10
Sound doesn't travel in space.
255
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
Astronomer Percival Lowell believed that he was the first person to observe canals on Venus, but because of a faulty adjustment of the eyepiece on his telescope, he was in fact looking at the blood vessels in his own eye.
4
There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
15
There are more nerve cells in the human brain than there are stars in the Milky Way.
349
A comet's tail always points away from the sun.
2