xkcd #2945: Broken Model ( imgs.xkcd.com )
In addition to eating foxes, rabbits can eat grass. The grass also eats foxes. Our equations chart the contours of Fox Hell.
![](https://mbin.grits.dev/media/cache/resolve/entry_thumb/b8/46/b846cb7e0277d1d05ce87628810fce30ffa9de6e2a39e16494a3ec47396ada3b.png)
In addition to eating foxes, rabbits can eat grass. The grass also eats foxes. Our equations chart the contours of Fox Hell.