From Snakes on a Blog. Other possibilities naturally suggest themselves: “I has a spin” (or “scalar cat can has no spin!”). If anyone can make a picture appropriate for the caption “SO(3) Cat can has double covur,” I’ll award you the first-ever Sunclipse Group Theory Popularization Medal.
For earlier entries in this genre, see Science-Themed Lolcats.
I want pictures of “M-Theory cat has 10^500 vacyoomz” and “Invisible Higgs!”.