Not to nitpick, Max Tegmark is a cosmologist. I only recently learned the difference when I called a cosmologist friend an astrophysicist. Cosmology deals with

Not to nitpick, Max Tegmark is a cosmologist. I only recently learned the difference when I called a cosmologist friend an astrophysicist. Cosmology deals with the big stuff, almost philosophically, like: "where did the universe come from" and "what is the fate of the universe", while astrophysics deals with the nature of the things within, like: "how do stars form" and "what happens when black holes collide". Max is deeply invested in modeling, analysis and prediction software, and I suspect did the bulk of the work in the paper. Henry Lin is a student who is focused on astrophysics. He gave an interesting TED talk (http://www.ted.com/speakers/henry_lin http://www.ted.com/speakers/henry_lin) a few years back about studying distant galaxy clusters. Henry is energetic and almost viscerally inspired by the beauty of science and mathematics, such a wonderful quality! His voice is definitely in the prose of the paper.