Joint discs and hammer: what they have in common

1. Step 1. Joint discs — is part of — Teddy bear. Movable limbs.
2. Step 2. Teddy bear — is made of — Wool. Plush.
3. Step 3. Wool — is material for — Trousers. The oldest trousers (Yanghai) were sewn from wool.
4. Step 4. Trousers — uses — Needle. Trousers were sewn with a needle.
5. Step 5. Needle — evolved from — Stone tool. Bone needles with an eye are part of the Palaeolithic toolkit.
6. Step 6. Stone tool — evolved into — Hammer. The first hammer was a stone in the hand.

Open Evothings