An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
In the last 7 years, humanity has discovered 43 potentially habitable planets.
14
There are more nerve cells in the human brain than there are stars in the Milky Way.
349
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219