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Overview: This news brief, from September 2012, describes the aftermath of mass extinctions--what happens to surviving species in the wake of a massive extinction event. Author/Source: UC Museum of Paleontology Grade level: 13-16 Time: 30 minutes Teaching tips: This article includes a set of discussion and extension questions for use in class, as well as advanced discussion questions for undergraduates. It also includes hints about related lessons that might be used in conjunction with this one. Get more tips for using Evo in the News articles in your classroom. Concepts: Correspondence to the Next Generation Science Standards is indicated in parentheses after each relevant concept. See our conceptual framework for details. Biological evolution accounts for diversity over long periods of time. Mass extinctions occur. The fossil record provides evidence for evolution. The fossil record documents the biodiversity of the past. The fossil record documents patterns of extinction and the appearance of new forms. Occupying new environments can provide new selection pressures and new opportunities, leading to speciation. Scientists use fossils (including sequences of fossils showing gradual change over time) to learn about past life. Teacher background: Speciation

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