A mysterious experiment is the subject of an episode of The Engines of Our Ingenuity. The episode is titled The Double Slit Experiment and is numbered 2631. Further information about this experiment can be found in the episode.

The title suggests a focus on a specific scientific experiment, but details are not provided here. For more information about The Double Slit Experiment, listeners can refer to episode 2631 of The Engines of Our Ingenuity.