Morning sketch of a unionid mussel I found on the bank of the Big Sioux River earlier this year.
First the sketch, then the questions that the sketch brought to mind.

Thinker. Tinkerer. Thinkerer. Professor of Philosophy, Religion, Classics, and Environment.
Morning sketch of a unionid mussel I found on the bank of the Big Sioux River earlier this year.
First the sketch, then the questions that the sketch brought to mind.