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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Because heat expands the metal, the Eiffel Tower always leans away from the sun.
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Sound at the right vibration can bore holes through a solid object.
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Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
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Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
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Nylon is made from coal and petroleum.
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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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There are more than 270 people cryogenically frozen in the hope that one day the technology will exist that can revive them and extend their lives.
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