The Earth's atmosphere weighs about 5.5 quadrillion tons.
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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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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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A single speck of dust is half way in size between a subatomic particle and the Earth.
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The sun is 330,330 times larger than the earth.
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A cesium atom in an atomic clock beats over nine billion times a second.
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Brass doorknobs automatically disinfect themselves in about 8 hours.
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Indoor pollution is 10 times more toxic than outdoor pollution.
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