Weren't we talking about the DOUBLE slit experiment: http://en.wikipedia.org/wiki/Double-slit_experiment I see it mentions that Buckyballs exhibit the same behavior but are actual physical (visible) molecules. This is the part that warps my mind. If this happens with physical objects (not just with electrons or photons) it boggles my mind. It can only mean that the molecules are interfering with themselves or something is going on that we clearly just don't understand. (I know this gets rolled up under wave-particle duality, but that is not really an explanation to me, just a restating of observation. Perhaps it's because I don't know/understand the math behind it or maybe it's because the math has been co-opted to to support the explanation.