Multiple choice Which of the following geological periods did dinosaurs NOT live in? Triassic Jurassic Cretaceous Paleogene Reveal answer Fill a bubble to check yourself D Correct answer Explanation Dinosaurs lived during the Mesozoic Era, which consists of the Triassic, Jurassic, and Cretaceous periods. The Paleogene is a period in the Cenozoic Era, which occurred after the extinction of non-avian dinosaurs.