If a scientist found a piece of rock in a crater mostly composed of iron and nickel, then he actually found a meteorite.
A meteorite is a celestial body that originated in space and survived the entry to the atmosphere to be found as a piece in a crater on the surface.
A meteorite is a fragment of a meteor or asteroid, which is predominantly composed of metals such as iron and nickel.
In conclusion, if a scientist found a piece of rock in a crater mostly composed of iron and nickel, then he actually found a meteorite.
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