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No one yet knows just when men began to make fire themselves, but scientists believe that it happened very early in history. They say that it must have come about as a result of the observation of sparks. Hot sparks blown by the wind spreads forest fires, and early toolmakers must have noticed that the rocks they chipped at often threw off similar sparks. It's likely that these first artisans obviously began to select those rocks that would make sparks every time they were struck. A very common mineral, iron pyrites, will give a shower of sparks when hit with another stone. Flint, the basis for many early tools, does this even better. This method of producing sparks by striking stones together is known a percussion, and all that is needed to start a fire is to direct the sparks to a pile of tinder made of dry leaves and tiny scraps of wood.

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15y ago

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