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This is Scientific American 60-Second Science. I'm Sophie Bushwick. Got a minute?

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Iron is a great material for making tools.

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But the oldest known iron artifacts were actually intended for decoration: nine Egyptian beads that date back to 3200 B.C.

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And now we know that this ancient jewelry has an even more impressive origin, the iron out of which it was crafted came from space.

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The metal cylinders were discovered in Egypt in 1911.

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To analyze the structure and chemical composition of the beads, researchers bombarded them with neutrons and gamma rays.

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The tests revealed that the jewelry contained trace elements not present in Earthly ores, but that are found in iron-rich meteorites.

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The study is in the Journal of Archaeological Science.

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The meteoric metal was hammered flat and rolled into beads more than 5,000 years ago.

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This date is some 1,500 years before the invention of smelting.

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That technique made it possible for terrestrial iron to be shaped into tools,

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and to supplant copper and bronze as civilization's metal of choice.

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The new finding shows that long before smelting revolutionized tool use, some humans were already iron men.

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Thanks for the minute, for Scientific American 60-Second Science. I'm Sophie Bushwick.

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