Wing warping and bell: what they have in common

1. Step 1. Wing warping — evolved into — Aileron. Ailerons replaced wing warping.
2. Step 2. Aileron — is part of — Aeroplane. Ailerons.
3. Step 3. Aeroplane — includes — Seaplane. An aircraft.
4. Step 4. Seaplane — uses — Archimedes’ principle. Floats.
5. Step 5. Archimedes’ principle — is used in — Diving bell. Sinking with ballast.
6. Step 6. Diving bell — has part — Bell. A body open at the bottom.

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