When did dinosaurs go extinct?

The extinction of the dinosaurs is one of the most significant events in Earth’s history. Dinosaurs first appeared on Earth during the Mesozoic Era, approximately 245 million years ago. They thrived and diversified throughout the era, but their reign came to an abrupt end around 66 million years ago. The cause of their extinction has been a subject of scientific debate for decades. One theory suggests that a massive asteroid impact was the main cause, which triggered a chain reaction of environmental changes, including global wildfires, a “nuclear winter” effect, and ocean acidification. Other hypotheses suggest that volcanic activity or a combination of multiple factors may have contributed to their demise.