The population of the Earth has more than doubled since 1950.
151
The heart of an astronaut actually gets smaller when in outer space.
216
The temperature of the earth's interior increases by 1 degree every 60 feet down.
115
In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
175
It would take more than 150 years to drive a car to the sun.
569
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
If you went out into space, you would explode before you suffocated because there's no air pressure.
149
Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46