Most liquid laundry detergents are alive with living organisms that help to break down stains!
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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.
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A single speck of dust is half way in size between a subatomic particle and the Earth.
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When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
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Most dust particles in your house are made from dead skin!
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If the chemical sodium is dropped into water it will immediately and violently explode.
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In 1999, Harvard physicist Lene Hau was able to slow down light to 17 meters per second and in 2001, was able to stop light completely.
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