A mass extinction,in which the dinosaurs disappeared from Earth,occurred approximately ____ years ago.
A)6500
B)65,000
C)650,000
D)65,000,000
E)650,000,000

Question

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The mass extinction that caused the disappearance of the dinosaurs happened approximately 65,000,000 years ago, at the end of the Cretaceous period. This event was likely caused by a combination of factors, including a massive asteroid impact and volcanic activity.

A Mass Extinction,in Which the Dinosaurs Disappeared from Earth,occurred Approximately