Your body is creating and killing about 2.4 million red blood cells per second.
17
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
If you have 1 billion dollars and spend $1,000 every day, it would take you 2,740 years to go broke.
31
Iceland has been so culturally isolated through history since the Vikings, that compared to other Scandinavian counties, people who speak Icelandic can still read the old Norsk sagas.
4