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BiologyPaleontology and the Fossil Record
Paleontologists study fossils to understand ancient organisms. While fossils might look simple enough, they provide...
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Earth ScienceThe Rock Cycle
This module addresses the rock cycle, including the historical development of the concept. The relationships...
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Scientists and ResearchAtmospheric Chemistry Research that Changed Global Policy
This module traces the life and scientific research of Mario Molina, the first Mexican-born chemist...
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