Hovercraft and telescope: what they have in common

1. Step 1. Hovercraft — has part — Propeller. Air propellers.
2. Step 2. Propeller — is part of — Quadcopter (drone). Air propellers.
3. Step 3. Quadcopter (drone) — has part — Smartphone camera. A camera.
4. Step 4. Smartphone camera — is part of — AR glasses. Cameras.
5. Step 5. AR glasses — evolved from — Glasses. Glasses with a display.
6. Step 6. Glasses — evolved into — Telescope. The first telescopes were assembled by spectacle makers.

Open Evothings