Surgical suture and rope: what they have in common

1. Step 1. Surgical suture — uses — Needle. A surgical needle.
2. Step 2. Needle — evolved from — Stone tool. Bone needles with an eye are part of the Palaeolithic toolkit.
3. Step 3. Stone tool — is part of — Spear. Early spearheads were made of stone.
4. Step 4. Spear — evolved into — Harpoon. A spear with barbs.
5. Step 5. Harpoon — has part — Rope. A line connects the head to the hunter.

Open Evothings