Germ theory of disease and kite: what they have in common

1. Step 1. Germ theory of disease — is used in — Surgical mask. Protection against droplets.
2. Step 2. Surgical mask — is made of — Cotton. Mikulicz’s masks were gauze.
3. Step 3. Cotton — is material for — Glider. Covered with cotton fabric.
4. Step 4. Glider — evolved from — Kite. Lilienthal and Cayley studied the wing with kites and gliders.

Open Evothings