Lunokhod and newcomen engine: what they have in common

1. Step 1. Lunokhod — evolved into — Mars rover. Planetary rovers.
2. Step 2. Mars rover — is made of — Titanium. The wheels and parts are aluminium and titanium.
3. Step 3. Titanium — is material for — Artificial heart. The case is titanium.
4. Step 4. Artificial heart — has part — Piston pump. A pulsatile pump.
5. Step 5. Piston pump — is part of — Newcomen engine. The beam drove a mine pump.

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