Mars had an oxygen-rich atmosphere around 4 billion years ago
13
The Earth gets 100 tons heavier every day due to falling space dust.
673
If two pieces of metal touch in space, they become permanently stuck together.
808
Approximately 115 tons of ocean salt spray enters the earth's atmosphere each second.
100
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
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
Pluto is smaller than Russia.
9
There are two golf balls sitting on the moon.
721