GEOLOGY

Detailed explanation-1: -Many scientists believe that the impact of one or more meteorites was the major cause of the end-Mesozoic extinction.

Detailed explanation-2: -It ended with a massive meteorite impact that caused a mass extinction, wiping out the dinosaurs and up to 80% of life on Earth. Mesozoic signposts are colored blue.

Detailed explanation-3: -Evidence suggests an asteroid impact was the main culprit. Volcanic eruptions that caused large-scale climate change may also have been involved, together with more gradual changes to Earth’s climate that happened over millions of years.

Detailed explanation-4: -The era began in the wake of the Permian–Triassic extinction event, the largest well-documented mass extinction in Earth’s history, and ended with the Cretaceous–Paleogene extinction event, another mass extinction whose victims included the non-avian dinosaurs, pterosaurs, mosasaurs, and plesiosaurs.

Detailed explanation-5: -The Alvarez hypothesis was initially controversial, but it is now the most widely accepted theory for the mass extinction at the end of the Mesozoic Era. Paul says, ‘An asteroid impact is supported by really good evidence because we’ve identified the crater.