Ethanol and internet: what they have in common

1. Step 1. Ethanol — is material for — V-2 rocket. The fuel is ethyl alcohol.
2. Step 2. V-2 rocket — is a kind of — Liquid-propellant rocket engine. A liquid-propellant engine.
3. Step 3. Liquid-propellant rocket engine — is part of — Space Shuttle. Hydrogen-fuelled main engines.
4. Step 4. Space Shuttle — is made of — Silica (sand). The heat-shield tiles are silica fibre.
5. Step 5. Silica (sand) — is material for — Internet. The backbones are silica optical fibre.

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