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Long, quiet documentaries about physics and the cosmos — what things are
made of, how big they really are, and what the evidence actually shows.

Each episode is one question, taken slowly and seriously, for two hours or
more: quantum fields, relativity, particles, light, and the scale of things.
Made to be listened to at the end of the day, at a pace that asks nothing
of you.

Every episode lists its sources in the description and ships with a full
caption track. If something here is wrong, say so in the comments and it
will be corrected.