Cobalt-60 sources and gutenberg printing press: what they have in common

1. Step 1. Cobalt-60 sources — is part of — Gamma Knife. About 200 sources in a hemisphere.
2. Step 2. Gamma Knife — uses — Radioactivity. Cobalt-60.
3. Step 3. Radioactivity — is used in — Geiger counter. It detects particles.
4. Step 4. Geiger counter — has part — Loudspeaker. Clicks for every particle.
5. Step 5. Loudspeaker — is made of — Paper. The cone is paper.
6. Step 6. Paper — is used in — Gutenberg printing press. The impression is made on paper.

Open Evothings