A cesium atom in an atomic clock beats over nine billion times a second.
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It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
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Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
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Indoor pollution is 10 times more toxic than outdoor pollution.
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One ragweed plant can release as many as one billion grains of pollen!
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During photosynthesis, plants emit light humans can’t see, but NASA can see that light from space - and they've even made maps of it!
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The sun is 330,330 times larger than the earth.
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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.
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