Dinosaurs! What Happened to the Dinosaurs / Extinction Many scientists think the dinosaurs disappeared because a large asteroid hit the earth about 65 million years ago. It caused a lot of dirt and dust to be thrown up into the atmosphere. The thick dust cloud blocked the sunlight for months and possibly even for several years. This made it very cold and also killed many plants and animals that the dinosaurs needed for food. Even before this happened, there were volcanoes erupting in some parts of the world and there had already been changes in the climate that had probably made it harder for the dinosaurs to live even before the asteroid. Click Here for Page With Good Video Clips Click One of These Links for a More Detailed Explanation Click Here Click Here Click Here Web Pages About What happened to the Dinosaurs / Extinction Click Here Smithsonian National Museum of Natural History Dinosaur Extinction: The Asteroid Hypothesis Click Here General Question and Answers about Dinosaurs Including Extinction Click here A Mungo Park Article: Fatal Impact Click Here BillyBear4Kids.com Page Click Here Dinosuar Extinction Info Click here What Killed the Dinosaurs? Click Here DinoBuzz Article on What Killed the Dinosaurs? Click Here San Diego Natural History Museum's Death of a Nodosaur Click Here Info for Older Kids and Teachers Click Here Enchanted Learning.com Home / Kinds of Dinosaurs / Meat Eaters & Plant Eaters / Lived Long Ago / Hatched From Eggs / Sizes of Dinosaurs / What Happened to Dinosaurs-Extinction / Paleontologists / Fossils / Resources, Games, Etc.