Term: 20th century, Description: Century, Question: Were dinosaurs extinct in the 20th century?, Answer:Yes
Fact1: There is no scientific evidence that any dinosaurs, such as Tyrannosaurus, Velociraptor, Apatosaurus, Stegosaurus, or Triceratops, are still alive. Fact2: These, and all other non-avian dinosaurs became extinct at least 65 million years ago at the end of the Cretaceous Period. 