The crash created the underground Manson Crater—which has a diameter of 24 miles and reaches into four neighboring counties. "It's hard to predict exactly what you are going to hit," state ...

Recent geological dating of the Manson crater in Iowa, the largest crater in the U.S., has proved that a mile-wide asteroid crashed into the Earth 66 million years ago, geologists say. This was ...

The difficulty apparently is because of a meteor that struck an estimated 74 million years ago, creating what is known as the Manson impact crater. Geologists believe the meteor caused a ...

The northwest Iowa town of Manson, sitting atop what likely is the continent's largest meteorite impact crater, could lose its distinction as the state's only city with naturally occurring soft water.

A meteorite slammed into the region, sending up rocks from five miles below the surface. The Manson Crater spans parts of four counties with a diameter of 24 miles. The Des Moines Register says ...

Seventy-four million years ago, a smaller one-mile-wide asteroid struck in central Iowa, creating the Manson Crater. Now covered with soil, it is the largest crater in North America at more than ...

A meteorite slammed into the region, sending up rocks from five miles below the surface. The Manson Crater spans parts of four counties with a diameter of 24 miles. The Des Moines Register says ...

The difficulty apparently is due to a meteor that struck an estimated 74 million years ago, creating what's known as the Manson impact crater. There is no evidence of the meteor on the surface ...