Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
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0.3% of solar energy from the Sahara is enough to power the whole of Europe.
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If you are locked in a completely sealed room, you will die of carbon dioxide poisoning first before you will die of oxygen deprivation.
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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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Brass doorknobs automatically disinfect themselves in about 8 hours.
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Airports that are at higher altitudes require a longer airstrip due to lower air density.
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