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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According to studies, men change their minds two to three times more often than women.
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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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The sun is 330,330 times larger than the earth.
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At room temperature, the average air molecule travels at the speed of a rifle bullet.
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Aluminum used to be more valuable than gold!
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