The Earth's atmosphere weighs about 5.5 quadrillion tons.
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Sound travels fifteen times faster through steel than through air.
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One third of the electricity produced on earth is used to power electric light bulbs!
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MIT has developed a camera that captures the speed of light at a trillion frames per second.
20
Hot water can freeze faster than cold water.
181
Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
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Most dust particles in your house are made from dead skin!
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