News Main Animals Archaeology Dinosaurs Earth History Human Animal Space Tech   Mike Solontoi/University of Washington |   Incoming Comet? Fear Not A long-period comet called 2001 RX14 turned up in images captured in 2002 by the Sloan Digital Sky Survey telescope in New Mexico. Most mass extinctions on Earth, according to a new study, were not caused by comets striking the planet. | Watch Science Videos!   « back to article

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