But after analyzing deeply drilled rock core from the impact site created by the six-mile-wide asteroid, geologists have ...

About 66 million years ago, an asteroid slammed into the planet, wiping out all non-avian dinosaurs and about 70% of all marine species. But the crater it left behind in the Gulf of Mexico was a ...

slammed into the Gulf of Mexico, said Richard Norris, a paleoceanographer at the University of California San Diego. The impact caused a crater 24 miles deep and 125 miles wide, according to ...