I do agree that he is a bit hostile, he has too much of that Dawkins harshness. I didn't quite get where he rejected religion as myth -- that's all it is. Religious ideas by their very nature cannot be tested by science; most are simplistic claims of explaining the world, and lack testable evidence. Krauss is better at explaining physics; he lacks the poetic sense of Carl Sagan or Neil deGrasse Tyson.
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