Surgical forceps and solar panel: what they have in common

1. Step 1. Surgical forceps — evolved into — Haemostat. A clamp with a lock.
2. Step 2. Haemostat — has part — Ratchet. A ratchet lock.
3. Step 3. Ratchet — is part of — Windlass. A ratchet holds the load.
4. Step 4. Windlass — uses — Wheel. A windlass is a wheel and axle used as a simple machine.
5. Step 5. Wheel — is part of — Lunokhod. Wheels.
6. Step 6. Lunokhod — has part — Solar panel. A solar panel.

Open Evothings