Multilayer insulation blanket and petri dish: what they have in common

1. Step 1. Multilayer insulation blanket — is part of — Spacesuit. Multi-layer insulation against temperature swings.
2. Step 2. Spacesuit — is made of — Vulcanized rubber. The pressure bladder is rubber.
3. Step 3. Vulcanized rubber — is material for — Respirator. The mask is rubber.
4. Step 4. Respirator — evolved from — Surgical mask. A filtering mask.
5. Step 5. Surgical mask — uses — Germ theory of disease. Protection against droplets.
6. Step 6. Germ theory of disease — is used in — Petri dish. Growing bacterial cultures.

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