Bamboo tube and aeroplane: what they have in common

1. Step 1. Bamboo tube — is part of — Fire lance. A barrel with a gunpowder charge.
2. Step 2. Fire lance — evolved into — Hand cannon. A metal barrel instead of bamboo.
3. Step 3. Hand cannon — evolved into — Cannon. A large hand cannon.
4. Step 4. Cannon — is part of — Ironclad. Artillery.
5. Step 5. Ironclad — evolved into — Aircraft carrier. The first aircraft carriers were converted from battleships and cruisers.
6. Step 6. Aircraft carrier — uses — Aeroplane. Basing aircraft.

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