Photo: Single Asteroid Impact, Not Two, Killed Dinos, Study Says

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A new study of seabed sediments adds support to the theory that a single asteroid impact at Chicxulub, on Mexico's Yucatan Peninsula (seen here), wiped out the dinosaurs.

Scientists are embroiled in a fierce debate between supporters of a single-impact theory and those that believe at least two strikes, along with other factors, caused the extinctions.

Image from MapMachine

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