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Interactive Video(15 min 27 sec) Embedded quiz modules test students’ understanding as they watch a short film that explains how stickleback fish let scientists study evolution in action, identify key genes, and peer deep into the evolutionary past.
Film GuideThese classroom-ready resources complement the short film Evolving Switches, Evolving Bodies, which tells the story of the dramatic transformation of stickleback fish as they adapted to living in freshwater habitats drastically different from the ocean.
Short Film(15 min 27 sec) After the end of the last ice age 10,000 years ago, populations of marine stickleback fish became stranded in freshwater lakes dotted throughout the Northern Hemisphere in places like Alaska and British Columbia. These fish have adapted to a freshwater environment drastically different than the ocean.
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