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
The Earth gets 100 tons heavier every day due to falling space dust.
673
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
The typical spec of dust that you see floating in the air is half way in size between the Earth and a subatomic particle.
131
Pluto is smaller than Russia.
9
An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9
The light hitting the earth right now is 30 thousand years old.
163