The Chicxulub Crater is located on the Yucatán’s tip and into the gulf. It’s one of the largest craters on Earth at 110 miles (180km) in diameter. It occurred 65 million years ago at the end of the Cretaceous period, with asteroid have been at least 10km across. It has long been considered a potential dinosaur killer, as it’s date coincided with their disappearance, and the fact that the K-T boundary between Cretaceous and Tertiary sediments contained high levels of Iridium, a rare element on Earth that is very common in impactors. In March of 2010, it was confirmed by an international team of 41 experts with 20 years of data that the body that caused this impact was the reason for the demise of the dinosaurs and the end of the Cretaceous period. Despite this, several other large craters exist that are around the same age. Some experts believe that the object that struck Earth at this time broke up into several large objects before impact, the largest of which made the Chicxulub formation.