The temperature of the earth's interior increases by 1 degree every 60 feet down.
115
It 'snows' metal on Venus.
13
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
Only 55% of Americans know that the sun is a star.
986
The earth rotates more slowly on its axis in March than in September.
145
Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121
The population of the Earth has more than doubled since 1950.
151
It takes eight and a half minutes for light to get from the sun to earth.
159