Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
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Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
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If the chemical sodium is dropped into water it will immediately and violently explode.
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Out of all the senses, smell is most closely linked to memory.
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The hair of an adult man or woman can stretch 25 percent of its length without breaking.
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Neanderthal man had a brain capacity 100cc larger than modern man's.
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The smell of freshly cut grass is actually a plant distress call.
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4.5 pounds of sunlight strike the Earth each day.
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