On Titan, Saturn's largest moon, the atmosphere is so thick and the gravity so low that humans could fly through it by flapping "wings" attached to their arms.
7
The light hitting the earth right now is 30 thousand years old.
163
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46
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
Only 55% of Americans know that the sun is a star.
986
In the last 7 years, humanity has discovered 43 potentially habitable planets.
14