Okay so, one of my very close friends offered to sell a piece of his really well, and spectacular artworks. He told me if I give him the idea, that'd draw it up. Long story short, I'm looking for an item preferably spherical to some extent (Like a skull, mostly spherical) that has some relation to the term "Adapt to Survive." I've been brain-storming for a few days now and can't think of a single item. Any thoughts?

The wheel
A gear
A bullet