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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 optics activity, learners conduct an experiment to find out why two eyes are better than one!

free Ages 6 - 11 10 to 30 minutes