Huge Impact Crater Uncovered in Canadian Forest

A new radar-like survey that "strips" away vegetation found an impact crater.

Only about 175 impact craters are known worldwide, and when a space rock does slam into Earth with enough force to create a crater, the rock almost always evaporates on impact.

"Here we have a crater and we also have meteorites associated with it," Herd said. "There are only a dozen impact craters in the world that have that association."

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