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Overview: This news brief, from February 2012, describes the discovery of hybrid sharks in Australian waters, debunks some common misconceptions regarding the discovery, and examines the possible evolutionary trajectories of these animals. Author/Source: UC Museum of Paleontology Grade level: 9-12 Time: 20 minutes Teaching tips: This article includes a set of discussion and extension questions for use in class. 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. Fitness is reproductive success - the number of viable offspring produced by an individual in comparison to other individuals in a population/species. Teacher background: Speciation Natural Selection

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