@amit @amit Neither of your colleagues time periods make sense logically. If dinosaur went extinct 200 or 2000 years ago wouldn't that have been mentioned at least one person of that time period. As far as I know there are no written record or drawing of dinosaurs until their fossil were discovered in the 19th century. Technically there are creatures that lived in the age of the dinosaur still alive today, but the mass extinction was what @artkavanagh said. Everythingliterally everything