Lidar and multistage rocket: what they have in common

1. Step 1. Lidar — is part of — Self-driving car. Lidar builds a 3D map of the surroundings.
2. Step 2. Self-driving car — has part — GPS (satellite navigation). Satellite navigation.
3. Step 3. GPS (satellite navigation) — is part of — Reusable rocket. Navigation during landing.
4. Step 4. Reusable rocket — evolved from — Multistage rocket. The first stage returns.

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