In the last 7 years, humanity has discovered 43 potentially habitable planets.
14
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
The temperature of the earth's interior increases by 1 degree every 60 feet down.
115
If you went out into space, you would explode before you suffocated because there's no air pressure.
149