Cockpit and stone tool: what they have in common

1. Step 1. Cockpit — has part — Attitude indicator. An attitude indicator.
2. Step 2. Attitude indicator — has part — Gyroscope. A gyroscope.
3. Step 3. Gyroscope — works like — Spinning top. A gyroscope is a top in a gimbal.
4. Step 4. Spinning top — has part — Sharp point. A fulcrum.
5. Step 5. Sharp point — is part of — Needle. It pierces the fabric.
6. Step 6. Needle — evolved from — Stone tool. Bone needles with an eye are part of the Palaeolithic toolkit.

Open Evothings