Nuclear submarine and internet: what they have in common

1. Step 1. Nuclear submarine — has part — Steam turbine. A turbine turns the propeller.
2. Step 2. Steam turbine — evolved into — De Laval nozzle. De Laval invented the nozzle for a steam turbine.
3. Step 3. De Laval nozzle — is part of — Solid rocket motor. A nozzle.
4. Step 4. Solid rocket motor — is part of — Space Shuttle. Boosters.
5. Step 5. Space Shuttle — is made of — Silica (sand). The heat-shield tiles are silica fibre.
6. Step 6. Silica (sand) — is material for — Internet. The backbones are silica optical fibre.

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