Axe poll and syringe: what they have in common

1. Step 1. Axe poll — is part of — Axe. The back part for striking.
2. Step 2. Axe — evolved from — Hand axe. A hand axe mounted on a handle.
3. Step 3. Hand axe — is a kind of — Stone tool. A hand axe is a kind of stone tool.
4. Step 4. Stone tool — evolved into — Needle. Bone needles with an eye are part of the Palaeolithic toolkit.
5. Step 5. Needle — is part of — Syringe. A hollow needle.

Open Evothings