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This is a story about the demise of the dinosaur.
Tags: Dinosaurs Meteorites Triassic Period Jurassic era Mesozoic Era

Jim Colyer covers the basics of astronomy.
, and vertebrates followed. Fish evolved into amphibians which evolved into reptiles. Dinosaurs lived in the Mesozoic Era between 65 million and 220 million years ago. Tyrannosaurus, brontosaurus, <>stegosaurus
Tags: Jim Colyer astronomy moon solar system sun pl