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.
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It's possible to die from a broken heart; it's called Stress Cardiomyopathy.
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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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Cows can sleep standing up, but they can only dream lying down.
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A lump of pure gold the size of a matchbox can be flattened into a sheet the size of a tennis court.
140
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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