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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One cubic foot of gold weighs more than 1,200 pounds!
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A ball of glass will bounce higher than a ball made of rubber.
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Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
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In the 1950s, the US government placed beer next to an atomic bomb blast to determine if it was still drinkable. The result: in the event of a nuclear war, beer is safe to drink!
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A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
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Brass doorknobs automatically disinfect themselves in about 8 hours.
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For a high school science fair project, 17-year-old Michio Kaku built a particle accelerator in his parent's garage that was able to generate a magnetic field 20,000 times greater than the Earth's and produce collisions powerful enough to create antimatter.
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