Test buffer solution vial and rope: what they have in common

1. Step 1. Test buffer solution vial — is part of — Rapid test. It extracts the antigen from the sample.
2. Step 2. Rapid test — is made of — Gold. The label is gold nanoparticles.
3. Step 3. Gold — is material for — Dentures. Etruscan dentures were gold bands.
4. Step 4. Dentures — is made of — Bone. With teeth made of bone or real teeth.
5. Step 5. Bone — is material for — Harpoon. The oldest harpoons (Katanda, ~90,000 years ago) are carved from bone.
6. Step 6. Harpoon — has part — Rope. A line connects the head to the hunter.

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