Mars had an oxygen-rich atmosphere around 4 billion years ago
13
There is a mass reservoir of water floating in space that is 100,000 times bigger than our sun and holds 140 trillion times more water than all of our oceans.
11
Saturn's rings are about 500,000 miles in circumference but only about a foot thick.
160
If aliens located 60-65 million light years away from us, looked at earth through a really powerful telescope today, they would see dinosaurs!
18
The Earth gets heavier each day by tons, as meteoric dust settles on it.
118
Neil Armstrong, the first man to step foot on the moon, carried with him a piece of cloth and wood from the original 1903 Wright Flyer.
12
If you went out into space, you would explode before you suffocated because there's no air pressure.
149
