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Overview: Trap-jaw ants made headlines with the record-breaking speed of their jaws and a quirky behavior: flinging themselves into the air using the power of their mandibles. This news brief from October 2006 reveals the evolutionary story behind the headlines. Author/Source: UC Museum of Paleontology Grade level: 9-12 Time: 15 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: Features sometimes acquire new functions through natural selection. A hallmark of science is exposing ideas to testing. Scientists test their ideas using multiple lines of evidence. Scientists can test ideas about events and processes long past, very distant, and not directly observable. Scientists use multiple research methods (experiments, observational research, comparative research, and modeling) to collect data. Evolutionary trees (i.e., phylogenies or cladograms) portray hypotheses about evolutionary relationships. Teacher background: Classification/Phylogenetics Adaptation

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