A few comments on the video: it is certainly true that Stephen Hawking is an awe-inspiring figure in academic physics. But to compare him with the other people seems odd. It simply does not do enough justice to the towering achievements of this eminent physicist. Using IQ as a statistical measure hardly does any justice to the scope and depth of Hawking's work. (Indeed, I was trying to impress upon a mathematician friend of mine that intelligence should be viewed as a partial order, not a total order. In that IQ tends to represent intelligence on a flat, linear scale, IQ cannot be used as the only measure of intelligence.) Hawking is the sort of genius whose work cannot be easily compared to that of anyone else, and it is quite wrong headed to even compare him against the others in this list insofar as actual scholarly work is concerned. A second comment would also be in order. Regarding Christopher Langan: I must note a correction to what has been claimed in the video. Langan's work, while done in earnest, does not quite stand up to scholarly scrutiny. Here is my Quora post on the same.