Natural gas and needle: what they have in common

1. Step 1. Natural gas — is used in — Thermal power station. Gas.
2. Step 2. Thermal power station — has part — Boiler. Boilers.
3. Step 3. Boiler — is part of — Steam hammer. A boiler supplies the steam.
4. Step 4. Steam hammer — evolved from — Hammer. A steam hammer is a hammer lifted by steam, used to forge huge parts.
5. Step 5. Hammer — evolved from — Stone tool. The first hammer was a stone in the hand.
6. Step 6. Stone tool — evolved into — Needle. Bone needles with an eye are part of the Palaeolithic toolkit.

Open Evothings