I was recently thinking about the human body and the energy we get from food. I understand we don't have the ability to properly digest certain things like stones and wood and grass, but if we did, I was imagining that trees would be a great source of food. I was wondering, how many calories are in a piece of wood, let's say 1 cubic inch, for edibility's sake.

I'm also not sure if the type of wood matters, but if it does, let's say something simple like oak or hemlock, and as dry as the piece would get at room temperature in a normal home.

Thanks!