Carved stone cylinder and car: what they have in common

1. Step 1. Carved stone cylinder — is part of — Cylinder seal. A stone with a carved image.
2. Step 2. Cylinder seal — works like — Gutenberg printing press. An analogy: both a seal and a press reproduce a pre-carved pattern.
3. Step 3. Gutenberg printing press — evolved into — Rotary printing press. Cylinders instead of a flat press.
4. Step 4. Rotary printing press — has part — Watt steam engine. The first rotary presses were steam-driven.
5. Step 5. Watt steam engine — is part of — Steam carriage. The steam engine.
6. Step 6. Steam carriage — evolved into — Car. Self-propelled vehicles before the combustion engine were steam-powered.

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