A Blast From the Past: Yucatan Peninsula, Mexico

The topography of Mexico's Yucatan Peninsula reveals a subtle, but unmistakable, indication of the Chicxulub asteroid impact crater, believed by many scientists to be the cause of a mass extinction event 65 million years ago. In this computer-enhanced image, the crater's outer boundary is visible as the semi-circular, darker green line in the peninsula's upper left corner: a trough only 3 to 5 meters (10 to 15 feet) deep and 5 kilometers (3 miles) wide.
Credit: NASA/JPL/NGA