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This week's puzzlements:

A tiny origami robot that folds itself, walks, swims, and then dissolves
An instrument so low you feel it more than hear it
A chemical that's a solid, liquid, and gas at the same time
Jetpacks flying over Dubai
Martial arts as seen from a satellite

Featured activity: Students explore the gap between historical figures and the legends told about them. Would St. Patrick be proud of his legend, embarrassed, or confused?

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