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This lesson takes approximately 12 minutes to complete. It includes 16 interactive questions with immediate feedback.

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Hide the Moth — How does natural selection work?

Natural selection is simple: whatever survives has the babies, so the survivors' traits take over the whole group. In this lesson you play a hungry bird picking moths off a tree trunk, and in four springs your own eyes turn the moths invisible — because every moth you missed is one that bred. Then factory soot blackens the tree and everything flips. Based on the true story of the peppered moth in Manchester.

Hide the Moth — How does natural selection work?

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