About 65 million years ago but last night I was listening to 50, 60, 70s music and my 10 ten year old Grandson advised me that was music Dinosaurs and Cave Men listened to, so according to that it - was only maybe 40+ years ago.
How long ago did the dinosaurs go extinct? I'm doing a report on how many years ago the dinosaurs went extinct. I'm in the 10th grade.
I find it sad that you have advanced to the 10th grade, with no idea how to find the answer to this by doing your own research.