Brass doorknobs automatically disinfect themselves in about 8 hours.
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Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
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One third of the electricity produced on earth is used to power electric light bulbs!
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All Humans Are 99.9% Genetically Identical and 98.4% of human genes are the same as the genes of a chimpanzee.
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Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
0
One barrel of petroleum holds 42 gallons.
20
Balsa wood is classified as a hard wood!
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