Nylon and electronic calculator: what they have in common

1. Step 1. Nylon — evolved into — Kevlar. Aramids are relatives of polyamides.
2. Step 2. Kevlar — is material for — International Space Station. The micrometeoroid shielding is Kevlar and Nextel.
3. Step 3. International Space Station — has part — Solar panel. Solar panels.
4. Step 4. Solar panel — is part of — Electronic calculator. Many run on a solar cell.

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