Kettle grill bowl and turbine: what they have in common

1. Step 1. Kettle grill bowl — is part of — Grill. A container for coals.
2. Step 2. Grill — uses — Charcoal. Charcoal.
3. Step 3. Charcoal — uses — Combustion. Burning wood without air.
4. Step 4. Combustion — is used in — Heron’s aeolipile. A fire boils the water in the cauldron.
5. Step 5. Heron’s aeolipile — evolved into — Turbine. The aeolipile is the oldest ancestor of the steam turbine.

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