Hyperloop (concept) and barrel: what they have in common

1. Step 1. Hyperloop (concept) — evolved from — Maglev. It develops the idea of magnetic levitation.
2. Step 2. Maglev — is made of — Concrete. The guideway is concrete.
3. Step 3. Concrete — evolved from — Roman concrete. A revival of Roman technology.
4. Step 4. Roman concrete — is material for — Amphitheatre. The Colosseum.
5. Step 5. Amphitheatre — has part — Arch. Arcades.
6. Step 6. Arch — works like — Barrel. Staves squeezed by hoops hold their shape by the same compression as the stones of an arch.

Open Evothings