An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
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
A 100-pound person on Earth would weigh 38 pounds on Mars.
102
Jupiter's moon Ganymede, is larger than the planet Mercury!
149
The volume of the Earth's moon is the same as the volume of the Pacific Ocean.
178
All of the Earth's continents are wider at the north than in the south - and nobody knows why.
194