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 last time that the Sun was in its current position in space around the Milky Way, dinosaurs ruled the Earth.
10
All of the Earth's continents are wider at the north than in the south - and nobody knows why.
194
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
There are approximately 3,500 astronomers in the U.S. - but over 15,000 astrologers.
124
Summer on Uranus lasts for 21 years.
358
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
If you went out into space, you would explode before you suffocated because there's no air pressure.
149