Scientists have determined dinosaurs dominated Earth for approximately 160 million years before their extinction. The extinction event is widely attributed to a massive asteroid impact roughly 66.6 million years ago. Prior to this impact, dinosaurs were the planet’s dominant species, thriving for an extended geological period. Researchers have been analyzing fossil records and geological data to refine timelines of dinosaur evolution and prevalence. This new estimate provides a clearer understanding of the duration of dinosaur rule. The findings contribute to ongoing research into the Cretaceous-Paleogene extinction event and its impact on life on Earth. This period of dominance ended abruptly, paving the way for the rise of mammals.