What extinction event wiped out the dinosaurs?

Answer

The extinction event that wiped out the non-avian dinosaurs is known as the Cretaceous-Paleogene (K-Pg) extinction event, formerly called the K-T extinction. This event occurred approximately 66 million years ago. Scientific consensus identifies the primary cause as the impact of a massive asteroid or comet at the Chicxulub crater in the Yucatan Peninsula of Mexico. The impact caused catastrophic environmental changes, including a massive dust cloud that blocked sunlight, halted photosynthesis, and led to a drastic drop in global temperatures, resulting in the extinction of about 75% of all species on Earth.