Mars had an oxygen-rich atmosphere around 4 billion years ago
13
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
The 409 escalators in the London subway cover a distance every week which is approximately equivalent to several trips around the globe!
94
Your thumb is about the same size as your nose.
124
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