Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
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Marie Curie, the Nobel prize winning scientist who discovered radium, died of radiation poisoning.
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Scientists aren't sure what color dinosaurs were.
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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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Research indicates that plants grow healthier when they are stroked.
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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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