much of the crater is buried offshore, under 600m of sediments On land, it is covered by limestone, but its rim is traced by an arc of sinkholes Max Alexander/B612/Asteroid Day Mexico's famous ...

One was the ... mountaintop impact crater discovered in northeastern China But what if the incoming impactors — whether comets, asteroids or smaller meteoroids — were made up of thousands ...

The impactor—most likely an asteroid—formed what is today the biggest crater on the planet. Scientists have widely accepted, based on previous research, that the impact structure, known as the ...