I think I want to start a collection of articles like this one. The article explains a bit of what scientists have have done to show how plants do division to efficiently use their stored energy through the night.
I already knew about how dogs take the optimal path, running and swimming, to fetch a frisbee, a task we would use calculus for.
Of course, the plants and animals aren't doing what we do, but these stories get me shaking my head in wonder.
What other examples do you know of?
[Thanks, David Petersen, for tweeting this.]