Mars had an oxygen-rich atmosphere around 4 billion years ago
13
If you were to cry in space, the tears would form a bubble in your eye until it's so big it moves to another spot on your face.
10
Earth is the only planet in our solar system that's not named after a god or goddess.
17
NASA invented baby food as we know it today.
7
An international team of astronomers has spotted the farthest known gravitational lens and, as Albert Einstein predicted, it is a galaxy that deflects and intensifies the light of a much further object.
9
The last time that the Sun was in its current position in space around the Milky Way, dinosaurs ruled the Earth.
10