There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
15
Earth is the only planet in our solar system that's not named after a god or goddess.
17
A neutron star (what remains after a Super Nova) is so dense that a portion of it the size of a sugar cube would weigh as much as all of humanity, or more than all the cars in the United States.
5
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
The Earth gets heavier each day by tons, as meteoric dust settles on it.
118
Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121
The temperature of the earth's interior increases by 1 degree every 60 feet down.
115
The earth is .02 degrees hotter during a full moon.
157