The extinction of dinosaurs must have been related to a major event. Something enormous had to have happened in order to completely devastate these really massive animals.

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Dinosaurs' Extinction: An Incredible Mystery

by Shahznane Molou

Introduction to Geoscience

Dr. Peter Bolton

26 March 2009

Index

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Bibliography...............................................................................................................................8

What were the dinosaurs? The first dinosaurs appeared 230 million years ago during the Mesozoic era which is also called "The Age of the Dinosaurs". They survived ice age until a big natural phenomenon hit the earth and extinct them (Buckley, 1997). There were basically two types of dinosaurs living in the earth. They were the Saurischia which were the dinosaurs of similar hips to reptiles of today; and the Ornithischia which were of bird hips. Scientists distinguished the reptilian hips due to the steepness of the hips themselves compared to the other bird-hipped dinosaurs (Power point on Dinosaurs from Dr. Bolton). A huge argument scientists have been through is whether dinosaurs were warm-blooded or cold blooded. The evidences that prove the first argument are the bone structures dinosaurs had which are very similar to us human beings. Their long legs show that dinosaurs were fast runners so there are chances they were warm blooded. However, other scientists also argue that dinosaurs may have been of cold blood due to the