In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
175
The population of the Earth has more than doubled since 1950.
151
The sun puts out more power in 1 second than mankind has ever used within human existence.
14
Any space vehicle must move at a rate of 7 miles per second in order to escape the earth's gravitational pull.
121
All of the Earth's continents are wider at the north than in the south - and nobody knows why.
194
There is a mass reservoir of water floating in space that is 100,000 times bigger than our sun and holds 140 trillion times more water than all of our oceans.
11
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
A lightning bolt generates temperatures five times hotter than those found at the sun's surface!
127