'Never-seen-before' crystals have been discovered in tiny fragments of space dust left behind by Chelyabinsk – the 21st century’s biggest meteor that exploded over Russia in 2013.The crystals were found in a variety of different shapes including hexagonal rods and closed, quasi-spherical shells.Analysis of the crystals by researchers from Chelyabinsk State University, Russia, has revealed that they are formed of graphene layers, or pure crystalline carbon.
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