Kite bridle and LIGO: what they have in common

1. Step 1. Kite bridle — is part of — Kite. The lines set the angle of attack to the wind.
2. Step 2. Kite — evolved into — Glider. Lilienthal and Cayley studied the wing with kites and gliders.
3. Step 3. Glider — has part — Wing. Wings.
4. Step 4. Wing — is part of — Space Shuttle. It landed like a glider.
5. Step 5. Space Shuttle — is made of — Silica (sand). The heat-shield tiles are silica fibre.
6. Step 6. Silica (sand) — is material for — LIGO. The mirrors are fused silica.

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