Smart contract and LIGO: what they have in common

1. Step 1. Smart contract — uses — Blockchain. It runs on a blockchain.
2. Step 2. Blockchain — uses — Internet. A peer-to-peer network.
3. Step 3. Internet — is made of — Silica (sand). The backbones are silica optical fibre.
4. Step 4. Silica (sand) — is material for — LIGO. The mirrors are fused silica.

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