Ceramic armor plates and needle: what they have in common

1. Step 1. Ceramic armor plates — is part of — Body armour. Ceramic or steel.
2. Step 2. Body armour — is made of — Kevlar. Kevlar.
3. Step 3. Kevlar — evolved from — Nylon. Aramids are relatives of polyamides.
4. Step 4. Nylon — is material for — Toothbrush. Nylon bristles (1938).
5. Step 5. Toothbrush — is made of — Bone. Addis’s toothbrush has a bone handle.
6. Step 6. Bone — is material for — Needle. The first needles with an eye were carved from bone.

Open Evothings