Theodolite and stone tool: what they have in common

1. Step 1. Theodolite — has part — Lens. A telescope.
2. Step 2. Lens — is part of — Cinématographe. A lens.
3. Step 3. Cinématographe — was inspired by — Sewing machine. Louis Lumière said he came up with the intermittent film feed while watching the fabric feed of a sewing machine.
4. Step 4. Sewing machine — has part — Needle. A needle with the eye near its point.
5. Step 5. Needle — evolved from — Stone tool. Bone needles with an eye are part of the Palaeolithic toolkit.

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