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S1-E4 Hearing Aids/3D Puzzles/Toilets
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S1-E4 Hearing Aids/3D Puzzles/Toilets

Wednesday 4:15am - 4:40am Discovery Science
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Wednesday, 5:15am - 5:40am Discovery Science +1
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Summary

How the designs of hearing aids, 3D puzzles and toilets were conceived, and the ways in which they have evolved.

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