This is a great illustration. The topic of this and the poem is quantum physics and gravity. Not mentioned directly, the cat in the box is Schrodinger's famous thought experiment. Look in the box to find the answer if the cat is alive or dead.

I like this illustration because of it's riddle nature. The images are not specific in the same way as the others. You can't argue the orientation is wrong, or there are anachronisms. You got a cat, a box, some starts, and that is it.

"Gravity is the uncertainty" sounds like a riddle. Otherwise, I don't catch his meaning. Gravity is the one part of physics not covered by quantum physics (uncertainty).