Scientific Acceptance of the Idea That Asteroids Could Strike Earth

question 66

Multiple Choice

Scientific acceptance of the idea that asteroids could strike Earth and wreak havoc is relatively recent.What event made this possibility become nearly universally accepted?

• A) discovery of the iridium layer at the K-T boundary
• B) discovery of the Chicxulub Crater
• C) observation of comet Shoemaker-Levy 9's collision with Jupiter
• D) discovery of Near-Earth-Objects that have Earth-crossing orbits
• E) recognition of ancient eroded craters in Canada

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