A cesium atom in an atomic clock beats over nine billion times a second.
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Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
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Only 12,000 years ago there was a species closely related to modern humans called Homo floresiensis that had been living on an Indonesian Island. They used fire and rather advanced tools, yet were only about 3 feet tall and weighed around 25kg.
15
Each day is longer than the previous on by 0.00000002 seconds which is 13 seconds each century!
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Termites are being researched as a possible renewable energy source as they can produce up to 2 litres of hydrogen from ingesting a single sheet of paper, making them one of the planet’s most efficient bioreactors.
24
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
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