![](https://fabbaloo.com/wp-content/uploads/2020/05/5460178-19960599-thumbnail_img_5eb0d83bea4f7.png)
The item was designed mathematically, like many Nervous System products, and is freely available for download on Thingiverse. They say:
Created through a 2D simulation of reaction diffusion extruded through time. The top of the model is t=0.
Of course, we knew that already.
Via Thingiverse