Theory of evolution and piston pump: what they have in common

1. Step 1. Theory of evolution — uses — Cell theory. Biology.
2. Step 2. Cell theory — uses — Microscope. Observing cells.
3. Step 3. Microscope — evolved into — Electron microscope. Overcoming the limit of optics.
4. Step 4. Electron microscope — has part — Vacuum pump. A vacuum in the column.
5. Step 5. Vacuum pump — evolved from — Piston pump. Guericke adapted the piston pump to pump out air.

Open Evothings