I listened to this episode for no other reason than it was Krauss. I've been reading him since the Physics of Star Trek twenty years ago. In the Youtube era, though, I've heard a number of his lectures which have disillusioned me a bit on his perceived rock star status: as a science educator, I don't consider him to be all that articulate; as a de facto public representative of skepticism, I find him combative and off-putting. Richard Dawkins is another example of a scientist who openly attacks religion, but he is much more eloquent and calculating in his approach. This episode is sadly indicative of Krauss' tendency to resort to snarky asides. It's not always bad: he recently appeared at a debate at a Muslim university in Britain, and upon discovering that the audience had been segregated by gender, he walked out. That's important, but here he's just trying to construct opportunities where he can poke at religion, and that's not constructive.
As far as physics, he's definitely a deserved leader, extremely bright and poised to succeed Hawking as the public's image of "really smart science dude." At his best, Krauss can explain with excitement and passion how the frontiers of science have pushed so far into the extremes of the Universe, and answered so many questions critical to the layman's understanding of everything, that the remaining questions (of which there are impossibly many) can only best be adequately answered with a temporary "I don't know" without the need for "here's where God comes in." He, along with many other popular scientists and reasoners, are proselytizing to a congregation that finds plenty of meaning just in being alive, in experiencing the world, and learning more about it. I feel what some might call the "holy spirit" whenever I see a sunrise or understand an equation, not because I think the experience was meant for me but because I was lucky enough to be a part of such a Universe and witness this little tiny portion of it for an infinitesimal speck of time.
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