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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Mars had an oxygen-rich atmosphere around 4 billion years ago
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Your body is creating and killing about 2.4 million red blood cells per second.
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The focusing muscles of the eyes move around 100,000 times a day. To give your leg muscles the same workout, you would need to walk 80km (50 miles) every day.
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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.
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Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
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