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Professor John Endler traveled to Trinidad in the 1970s to study wild guppies. In this activity, learners take part in an online simulation of Endler's work.

1 cent - $1 per group Ages 11 - adult 45 to 60 minutes
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In this activity, learners cut out and assemble wheels to explore how variations in fish body structures (mouth shape/position/teeth, body shape, tail shape, and coloration patterns) allow fish to sur

1 cent - $1 per group Ages 4 - adult 10 to 30 minutes