The Keys

When dealing with really small things / quantum physics, you can only find out either where a particle is or what its momentum is. (If you observe where a particle is, the light/photons bouncing off it that you observe change its momentum, so now you know where it was at that instant, but cannot determine its momentum, since you just changed it). This dilemma is called the Heisenberg Uncertainty Principle. This mural applies that principle to larger objects, which is silly and does not really work.