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Introduction and Overview
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Lecture 1
1/28/98
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| | Discussing the 4 billion year history of Life on Earth |
| | Impact of life on the planet |
| | Impact of the planet on life |
| | Why is the "History of Life" a geology class? |
| | Geologists have the record |
| | The history of the Earth is recorded in its rocks. |
| | The history of life is also recorded there. |
| | The earth and life have evolved together and molded each other |
| | The history of life is inseparable from the history of the Earth |
| | The Earth would be a very different place without life |
| | Changes to the Earth have greatly affected life on it |
| | An example of this co-evolution |
| | Earth's early atmosphere was quite different from today's |
| | It evolved to its present composition because of life |
| | Increasing oxygen level were poisonous to early life |
| | Mutations that allowed bacteria to live in this increasingly poisonous environment were selected for |
| | Oxygen in the atmosphere lead to formation of ozone Layer |
| | How do we reconstruct the history of life from the geologic record |
| | What are the tools that we use? |
| | What is the History of Life |
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