Only about 2% of the world population has green eyes.
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Mars had an oxygen-rich atmosphere around 4 billion years ago
13
Cows can sleep standing up, but they can only dream lying down.
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An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
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The oldest glowing lightbulb was first switched on in 1901 and lives in fire stations in Livermore, CA. It is known as the Centennial Light.
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There is a mass reservoir of water floating in space that is 100,000 times bigger than our sun and holds 140 trillion times more water than all of our oceans.
11
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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