Spandex and piston pump: what they have in common

1. Step 1. Spandex — is material for — Bra. Spandex.
2. Step 2. Bra — is made of — Silk. Mary Phelps Jacob’s bra was made of silk handkerchiefs.
3. Step 3. Silk — works like — Nylon. Nylon was created as a substitute for silk.
4. Step 4. Nylon — is material for — Spacesuit. The outer layer is nylon and other synthetic fabrics.
5. Step 5. Spacesuit — evolved from — Diving suit. A sealed suit with an air supply.
6. Step 6. Diving suit — has part — Piston pump. Air was pumped from the surface.

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