Which organisms lived during each era of time?
In this lesson, we will learn what the fossil record has taught us about the history of organisms that have existed on our planet. We will learn what a geologist is and what they can tell us about the organisms that have lived during each geological era of time. For this lesson you will need a piece of paper, a pencil and a ruler.
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Lesson summary: Which organisms lived during each era of time?
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The next lesson in Humans and animals over time is "What impact have humans had on plants and animals?"