A microscopic analysis revealed that a rock thought to be a meteorite from a fireball seen over Northern California on Oct. 17, is just a normal Earth rock. Peter Jenniskens, head of the Cameras for Allsky Meteor Surveillance, thought the stone, found in a backyard in Novato, Calif., was a meteorite based on its density and magnetic response. "I sincerely thought it was, based on what appeared to me was remnant fusion crust," Jenniskens said. "On closer inspection, that crust was a product of weathering of a natural rock, not from the heat of entry." Scientists are still hoping to find a meteorite from the fall.
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