From Wikipedia, the free encyclopedia. A teenager, or teen, is a young person whose age falls within the range from 13â19. They are called teenagers because their age number ends with teen. Usage by ordinary people varies, and also varies in different societies.
Astronomers and other scientists often speak of the extinction of dinosaurs on this earth. They believe that dinosaurs disappeared from the earth some 65 million years ago, long before man came along.They make these statements as if it were a known, proven scientific fact that dinosaurs were long gone by the time men appeared on the earth.hey believe that dinosaurs disappeared from the earth some 65 million years ago, long before man came along. They make these statements as if it were a known, proven scientific fact that dinosaurs were long gone by the time men appeared on the earth.
We have viewed the evidence and have decided to present our own theory. Dinosaur Extinction: The Premise Dinosaur extinction -- Most scientists believe that dinosaurs went extinct about 50 to 65 million years ago.Most scientists agree that manâs conception of dinosaurs has been limited to the past 180 years or so (the word itself wasnât even coined until 1841).e have viewed the evidence and have decided to present our own theory. Dinosaur Extinction: The Premise Dinosaur extinction -- Most scientists believe that dinosaurs went extinct about 50 to 65 million years ago.