Balsa wood is classified as a hard wood!
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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.
15
A single cup of gasoline, when ignited, has the same explosive power as five sticks of dynamite.
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Kissing actually has the biological purpose of passing on biological information and chemical signals to assess mating possibilities and status.
9
There are more atoms in one teaspoon of water than there are teaspoons of water in the Atlantic Ocean.
13
A ball of glass will bounce higher than a ball made of rubber.
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