Astronauts get taller when they are in space.
224
The earth rotates more slowly on its axis in March than in September.
145
All of the Earth's continents are wider at the north than in the south - and nobody knows why.
194
Only 55% of Americans know that the sun is a star.
986
Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121
Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46
There are two golf balls sitting on the moon.
721