There's been lots of speculation in the popular press claiming the Big Bang never happened. Supposedly, new data from the James Webb Space Telescope presents a crisis for an old universe that emerged from a hot dense plasma, in favor of a much more ancient cosmology -- a plasma cosmology. Yet the underpinnings of the Big Bang are more solid than ever, thanks in large part to the fossil evidence astrophysicists have found of primordial nucleosynthesis, also called BBN. Join me for a deep-dive into the physics of the formation of the elements, perhaps the most indisputable evidence for the hot Big Bang there is.

00:00 Intro

00:01 Pillars of the Big Bang Theory

05:40 I meant to say hydrogen makes up 60-70% of the body by atoms, not by mass

08:00 Time vs. temperature in the early universe

10:00 Planck's Law

19:00 Deuterium

20:20 What does Neil think?

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