Satellite Internet and glasses: what they have in common

1. Step 1. Satellite Internet — uses — Communications satellite. Communications satellites.
2. Step 2. Communications satellite — has part — Dish antenna. Antennas.
3. Step 3. Dish antenna — is part of — Radio telescope. A parabolic antenna.
4. Step 4. Radio telescope — is a kind of — Telescope. A telescope for radio waves.
5. Step 5. Telescope — evolved from — Glasses. The first telescopes were assembled by spectacle makers.

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