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Dinosaur-killing asteroid was likely a giant mudball, study says – CNN

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Dinosaur-killing asteroid was likely a giant mudball, study says  CNNUnusual Origin Found for Asteroid That Killed the Dinosaurs  The New York TimesRuthenium isotopes show the Chicxulub impactor was a carbonaceous-type asteroid  ScienceScientists think they know the origin of the asteroid that wiped out the dinosaurs  USA TODAYPaleontologist Ken Lacovara and the fifth extinction that killed the dinosaurs  NPR