0323-2022. New details on the asteroid impact that killed the dinosaurs. By Andrei Ionescu. writer. A new study led by Syracuse University has shed more Thecrater's diameter and depth are believed to be 110 miles (180 kilometers) and 12 miles (20 kilometers), respectively. The asteroid that is thought to have kiled the dinosaurs was huge. puchan Anasteroid impact 66 million years ago killed off most of the dinosaurs on Earth. The only dinos to survive were the species that went on to become birds. The Almost66 million years ago, an asteroid struck the Earth, killing all non-avian dinosaurs and allowing mammals to dominate. Humans' ancestors survived the asteroid impact that killed the Sixtysix million years ago, a giant asteroid impact on the Earth likely caused the extinction of the dinosaurs. Currently no known asteroid poses an immediate threat. Thereis new evidence that the diversity of non-avian dinosaur species may have been declining 10 million years before they vanished when a large asteroid hit Earth 66 million years ago Newevidence shows more than one asteroid could have killed the dinosaurs. Newly-discovered crater suggests the Chicxulub impact may have been part of an encounter with an asteroid cluster. by The prevailing view of dinosaur extinction based on the asteroid impact implies that the disappearance of dinosaurs should have been sudden and the effects should have been widespread, but the .

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