There are two golf balls sitting on the moon.
721
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 weighs around 6,600,000,000,000,000,000,000 tons (5,940 billion billion metric tons)!
221
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
All of the Earth's continents are wider at the north than in the south - and nobody knows why.
194
Approximately 115 tons of ocean salt spray enters the earth's atmosphere each second.
100
Some asteroids have other asteroids orbiting them.
131
The sun puts out more power in 1 second than mankind has ever used within human existence.
14