Burial chamber with sarcophagus and railway track: what they have in common

1. Step 1. Burial chamber with sarcophagus — is part of — Egyptian pyramid. The chamber with the sarcophagus.
2. Step 2. Egyptian pyramid — uses — Plumb bob. Plumb bobs were used by Egypt’s builders.
3. Step 3. Plumb bob — has part — Rope. A suspension fibre.
4. Step 4. Rope — evolved into — Wire rope. A steel counterpart of rope.
5. Step 5. Wire rope — is part of — Funicular. A cable.
6. Step 6. Funicular — uses — Railway track. Rails.

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