Investigations of a 200km-wide crater under the Gulf of Mexico suggest it is the scar left by the culprit asteroid. When it hit the Earth, the city-sized object would immediately have generated ...
When this 12km-wide object slammed into what is now the Gulf of Mexico ... The outer rim (white arc) of the crater lies partly under Mexico's Yucatan Peninsula A 12km-wide object dug a hole ...
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