Binoculars and newcomen engine: what they have in common

1. Step 1. Binoculars — evolved from — Telescope. A double telescope.
2. Step 2. Telescope — evolved from — Glasses. The first telescopes were assembled by spectacle makers.
3. Step 3. Glasses — evolved into — Microscope. Spectacle makers assembled the first microscopes.
4. Step 4. Microscope — evolved into — Electron microscope. Overcoming the limit of optics.
5. Step 5. Electron microscope — uses — Vacuum. The column is evacuated.
6. Step 6. Vacuum — is used in — Newcomen engine. Condensing the steam creates a vacuum under the piston.

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