This great sketch was shared with us by Cody Miles. He adds, "Here's something I did a few months ago, it's a still-life in graphite of a bobcat skull I bought in SF".
I also noticed that Cody had a few more skulls on his blog amongst various other paintings and drawings. A couple of the images may not be SFW(according to where you work), but they are all tastefully done. Thanks for sharing, Cody!