Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
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4.5 pounds of sunlight strike the Earth each day.
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Brass doorknobs automatically disinfect themselves in about 8 hours.
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The Earth's atmosphere weighs about 5.5 quadrillion tons.
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Scientists aren't sure what color dinosaurs were.
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The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
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According to scientists, the color of the cup that we're drinking from can alter our perception of the actual taste of the drink.
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