Nikolai Ivanovich Lobachevsky

This is Nikolai Ivanovich Lobachevsky, our other grey cat. We got him as a kitten, and at first he followed Newton around and did everything the older cat did. The name comes from the Tom Lehrer song of the same name, where Lobachevsky's secret to mathematical success is given as "Plagiarize!", as long as one is always careful to call it "research."
As he grew older, we realized that he simply doesn't have the same intellect as Newton (he won't come when you call him, howls like a Siamese, and is pretty much an all around goofball) so now he's just known as Neko.
Doesn't this image remind you of that famous picture of Albert Einstein with his tongue sticking out?