Cows can sleep standing up, but they can only dream lying down.
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Your body is creating and killing about 2.4 million red blood cells per second.
17
A cow produces around 200,000 glasses of milk in her lifetime.
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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
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
The 409 escalators in the London subway cover a distance every week which is approximately equivalent to several trips around the globe!
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