Archimedes’ principle and stone tool: what they have in common

1. Step 1. Archimedes’ principle — is used in — Diving bell. Sinking with ballast.
2. Step 2. Diving bell — evolved into — Diving suit. Individual equipment.
3. Step 3. Diving suit — has part — Piston pump. Air was pumped from the surface.
4. Step 4. Piston pump — works like — Syringe. A syringe is a hand-operated piston pump.
5. Step 5. Syringe — has part — Needle. A hollow needle.
6. Step 6. Needle — evolved from — Stone tool. Bone needles with an eye are part of the Palaeolithic toolkit.

Open Evothings