Fast breeder reactor and glasses: what they have in common

1. Step 1. Fast breeder reactor — uses — Isotopes. Breeding plutonium.
2. Step 2. Isotopes — is used in — Mass spectrometer. It discovered the isotopes of stable elements.
3. Step 3. Mass spectrometer — has part — Vacuum pump. A vacuum system.
4. Step 4. Vacuum pump — is part of — Electron microscope. A vacuum in the column.
5. Step 5. Electron microscope — evolved from — Microscope. Overcoming the limit of optics.
6. Step 6. Microscope — evolved from — Glasses. Spectacle makers assembled the first microscopes.

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