An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
If two pieces of metal touch in space, they become permanently stuck together.
808
In the last 7 years, humanity has discovered 43 potentially habitable planets.
14
Pluto is smaller than Russia.
9
Jupiter's moon Ganymede, is larger than the planet Mercury!
149
Sound doesn't travel in space.
255
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
The heart of an astronaut actually gets smaller when in outer space.
216