The typical spec of dust that you see floating in the air is half way in size between the Earth and a subatomic particle.
131
Sound doesn't travel in space.
255
All of the Earth's continents are wider at the north than in the south - and nobody knows why.
194
An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9
The light hitting the earth right now is 30 thousand years old.
163
The Earth gets heavier each day by tons, as meteoric dust settles on it.
118
If you went out into space, you would explode before you suffocated because there's no air pressure.
149