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Overview: In this section, you will see how study in four disciplinary areas — Earth's history, life's history, mechanisms of evolution, and development and genetics — has contributed to our current understanding of evolution. Author/Source: UC Museum of Paleontology Grade level: 9-12 Time: varies Teaching tips: This series of essays would make a good resource for student research projects on the history of evolutionary thought. Though clear, the writing level is somewhat advanced. Concepts: A hallmark of science is exposing ideas to testing. Science focuses on natural phenomena and processes. Scientists can test ideas about events and processes long past, very distant, and not directly observable. Scientific knowledge is open to question and revision as we come up with new ideas and discover new evidence. The real process of science is complex, iterative, and can take many different paths. Accepted scientific theories are not tenuous; they must survive rigorous testing and be supported by multiple lines of evidence to be accepted. Science is a human endeavor. Our understanding of life through time is based upon multiple lines of evidence. Teacher background: Nature of Science

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