Threshing machine and GPS (satellite navigation): what they have in common

1. Step 1. Threshing machine — evolved from — Quern. Mechanizing the processing of grain.
2. Step 2. Quern — uses — Friction. Grain is crushed and ground by the friction of the stones.
3. Step 3. Friction — is used in — Car brake. Pads press against the disc and shed speed through friction.
4. Step 4. Car brake — is part of — Electric car. Besides regeneration, ordinary friction brakes are needed.
5. Step 5. Electric car — evolved into — Self-driving car. Most self-driving cars are built on electric platforms.
6. Step 6. Self-driving car — has part — GPS (satellite navigation). Satellite navigation.

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