An 8 P.M. Bedtime, Oxygen Chambers, Blood Tests Galore. What Would You Do for a Longer Life?

The tech mogul Bryan Johnson is trying to design the blueprint for defying death.

Produced by Sophia Alvarez Boyd

Mr. Douthat is a columnist and the host of the “Interesting Times” podcast.

For my final episode as host of “Interesting Times,” I wanted a fitting finale — a conversation that encapsulates the ambition of this show: examining how seemingly radical........

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