Paraglider brake lines and stone tool: what they have in common

1. Step 1. Paraglider brake lines — is part of — Paraglider. Control lines for the trailing edge.
2. Step 2. Paraglider — evolved from — Parachute. A parachute wing.
3. Step 3. Parachute — is made of — Textile. A parachute canopy is sewn from light, strong fabric — first silk, later nylon.
4. Step 4. Textile — is used in — Knitting machine. Knitwear.
5. Step 5. Knitting machine — has part — Needle. Latch needles.
6. Step 6. Needle — evolved from — Stone tool. Bone needles with an eye are part of the Palaeolithic toolkit.

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