Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
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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
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
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One 75-watt bulb gives more light than three 25-watt bulbs.
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One ragweed plant can release as many as one billion grains of pollen!
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Sound travels about 4 times faster in water than in air.
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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
Most liquid laundry detergents are alive with living organisms that help to break down stains!
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