Broom twigs and archimedes’ screw: what they have in common

1. Step 1. Broom twigs — is part of — Broom. A bundle of twigs or sorghum.
2. Step 2. Broom — evolved into — Mop. A cleaning tool.
3. Step 3. Mop — is made of — Cotton. A mop is cotton strands.
4. Step 4. Cotton — is used in — Cotton gin. Cleaning cotton.
5. Step 5. Cotton gin — has part — Crank. The drum was turned by a handle.
6. Step 6. Crank — is part of — Archimedes’ screw. A handle or rotary drive.

Open Evothings