Magnifier frame with handle and stone tool: what they have in common

1. Step 1. Magnifier frame with handle — is part of — Magnifying glass. A frame with a handle.
2. Step 2. Magnifying glass — evolved into — Glasses. Reading stones — magnifying lenses — preceded glasses.
3. Step 3. Glasses — has part — Spectacle frame. A frame.
4. Step 4. Spectacle frame — is made of — Bone. The first frames were made of bone and horn.
5. Step 5. Bone — is material for — Needle. The first needles with an eye were carved from bone.
6. Step 6. Needle — evolved from — Stone tool. Bone needles with an eye are part of the Palaeolithic toolkit.

Open Evothings