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Paleontologists, by examining fossils, dicover traces of life from the geological past. This way we can find out how our world used to look like and what organisms use to live on Earth.

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Explanation:

Paleontologists use fossil remains to understand different aspects of extinct and living organisms. Individual fossils may contain information about an organism's life and environment. ... Studying oyster fossils can help paleontologists discover how long the oyster lived, and in what conditions.