AR glasses and kite: what they have in common

1. Step 1. AR glasses — has part — Smartphone camera. Cameras.
2. Step 2. Smartphone camera — is part of — Quadcopter (drone). A camera.
3. Step 3. Quadcopter (drone) — has part — Propeller. Air propellers.
4. Step 4. Propeller — is part of — Aeroplane. Propeller aircraft.
5. Step 5. Aeroplane — evolved from — Glider. The Wrights added an engine to a glider.
6. Step 6. Glider — evolved from — Kite. Lilienthal and Cayley studied the wing with kites and gliders.

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