Hey Matt--off topic, but interesting.

Did you know that they're using Fractal modeling to try and better understand respiratory physiology? (the pattern of bronchiole bifrication, to be more precise.) It's all about increasing surface area while reducing friction.

God is in the math...

P.S. I have become such a nerd. Here are some notes that I was writing *for*myself*. (Realization of stupid-nerdy-self is highlighted in red.)

vi. Pleural Linkage

1. Lungs are covered with visceral pleura
2. Thorax is lined with parietal pleura.
3. These two smooth layers have fluid in-between, thus creating a (functional) molecular attraction or bond.

a. As a result, the Lungs and Thorax functionally act as one.
b. Two opposing forces—finding an equilibrium point of rest at REL

i. A détente, if you will.