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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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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Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
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Your body is creating and killing about 2.4 million red blood cells per second.
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There are so many kinds of apples that if you ate a new one everyday, it would take over 20 years to try them all.
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