The Geological History of Earth
Source/Author: David McConnell, Jennifer Wiggen
Subject: How Earth has changed through time
Description: This video discusses the major changes to the planet since its formation to the present day. We explain how Earth formed, where the Moon came from, how the atmosphere changed over time, where the water in the oceans originated, what the first life and fossils looked like, when more complex life forms began, a long period when little happened, when most of Earth became a snowball, and how extinction events allowed geologists to break down the most recent chunk of geologic time. You will learn the difference between an eon and an era, why we should be grateful for asteroid and comet impacts, and when oxygen started showing up in the atmosphere.
Duration: 7:07
Comments:
URL: https://youtu.be/Z6k3NRy-YWs
