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Continue to ChatShae Frydenlund: The Yarsagumba Effect https://blog.education.nationalgeographic.org/2010/11/15/shae_frydenlund_the_yarsagumba_effect/
Shae Frydenlund: The Yarsagumba Effect https://blog.education.nationalgeographic.org/2010/11/15/shae_frydenlund_the_yarsagumba_effect/