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Biology 108: History of Life on Earth

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In this tutorial, we will learn about the history of life on Earth. We will first talk about tools (fossil dating) and theories, (continental drift) that help us understand our past. Next we will look at the geological time-scale and discuss three major eras: the Paleozoic, Mesozoic and Cenozoic.
We will talk about the Cambrian explosion, which was a major explosion in the diversity of life, and we will discuss mass extinctions, which were mass losses in the diversity of life forms. We will also look at the evolution of humans in the last 4 million years. 

lifes-history

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