Wristwatch and petri dish: what they have in common

1. Step 1. Wristwatch — is made of — Gold. The case is gold or silver.
2. Step 2. Gold — is material for — Rapid test. The label is gold nanoparticles.
3. Step 3. Rapid test — uses — Antibodies. Antibodies.
4. Step 4. Antibodies — uses — Germ theory of disease. Immunity against microbes.
5. Step 5. Germ theory of disease — is used in — Petri dish. Growing bacterial cultures.

Open Evothings