Signs of huge Antarctic meteorite impact found

Scientists have found the first evidence of what they think is an enormous impact crater in Antarctica.

The research team was led by geophysicist Ralph von Frese of Ohio State University. Von Frese examined data from a satellite that mapped subtle differences in Earth's gravitational field. He found a large area in Antarctica of unusually dense rock. Radar images from aircraft revealed a large basin, which von Frese thinks is an impact crater 500 kilometers, or about 300 miles wide.

Program #4,926 of the Earth & Sky Radio Series
Hosts Deborah Byrd and Joel Block

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