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Dinosaur-destroying asteroid struck in spring

Nature Podcast

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The Iron Dagger of King Tu

An iron dagger found in king tuten carman's tomb suggested that an iron nickel meteorite probable source of the blade's metal. Researchers have now used an ex ray florescence technique to map the knife in new detail. They found that the nickel was distributed in a cross hatch pattern typical of a group of meteorites called octa hedrites. For the blade to have retained this, they say it must have been forged at relatively low temperatures.

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