Guest: Dr. Peter Gao

Postcard: Dr. James T. Keane

Dr. Peter Gao visits Michael in Seattle to share his research on how atmospheric oxygen can be made without life. Such copious amounts of oxygen might fool astronomers as false-positive biosignatures—but there are clever ways to combat this uncertainty. Then, Michael and Peter respond to Dr. James T. Keane's digital postcard reviewing the first-ever Short Treks episode, "Runaway."

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Michael: @Miquai

Peter: @PlanetaryGao

James: @jtuttlekeane