The heart of an astronaut actually gets smaller when in outer space.
216
The population of the Earth has more than doubled since 1950.
151
Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46
There are approximately 3,500 astronomers in the U.S. - but over 15,000 astrologers.
124
A lightning bolt generates temperatures five times hotter than those found at the sun's surface!
127
Summer on Uranus lasts for 21 years.
358
If you were to cry in space, the tears would form a bubble in your eye until it's so big it moves to another spot on your face.
10
The Earth gets 100 tons heavier every day due to falling space dust.
673