Vulcanized rubber and watt steam engine: what they have in common

1. Step 1. Vulcanized rubber — is material for — Spacesuit. The pressure bladder is rubber.
2. Step 2. Spacesuit — evolved from — Diving suit. A sealed suit with an air supply.
3. Step 3. Diving suit — has part — Piston pump. Air was pumped from the surface.
4. Step 4. Piston pump — evolved into — Watt steam engine. The first steam engines (Newcomen’s) pumped water out of mines by driving pumps.

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