Logging Surprise!

I have been finding these at the rate of about one per week since I moved back to California. The nickel is included for scale. I found this one while I was removing a tree stump.

I have been using them for an experiment in self-assembly. If I convert each one to a monolayer, how many specimens will I have to test before one of them self-assembles back to its original shape? Anyone reading this blog want to venture a guess?