Textbook Problem

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The dinosaurs died out ______ million years ago.

Summary Introduction

Introduction: Mass extinction is a phenomenon in which a huge number of species will disappear within a very short period in the geological time. It was believed that it would have been disappeared due to certain factors called as catastrophic asteroid impact or due to the random changes in the environment that have taken place on earth.

Explanation of Solution

Reason for correct answer:

The various events occurred during the past times can be represented by the chemical, biological and physical processes that functions nowadays. Due to the mass extinction the dinosaurs became extinct during 66 million years ago...