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We dive back into The Character of Physical Law by Richard Feynman, again using short clips pulled from the lectures themselves and reading excerpts from the book. This episode we focus mostly on the second lecture, "The Relation of Mathematics to Physics", where Feynman talks about how Nature seems to follow sets of mathematical rules, and how those mathematics might be related--at least in some cases--to large numbers of simple processes in the physical universe.

Near the end of the episode we start on the third lecture, "The Great Conservation Principles", discussing the various "conservation" laws in physics such as the conservation of charge, the conservation of energy, etc.

At the beginning of the episode we also take a quick look at the working relationship between Tycho Brahe and Johannes Kepler, their backgrounds, and the standard history of their story.