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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MIT has developed a camera that captures the speed of light at a trillion frames per second.
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One cubic foot of gold weighs more than 1,200 pounds!
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4.5 pounds of sunlight strike the Earth each day.
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In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
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Iron weighs more after it rusts.
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Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
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Because heat expands the metal, the Eiffel Tower always leans away from the sun.
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