Elon Musk’s startup Neuralink wants to implant a tiny chip in people’s brains, and it’s looking for a volunteer for its first clinical trial.

Ashlee Vance, a Musk biographer and Bloomberg Businessweek contributor, made nearly a dozen visits to Neuralink facilities over the past three years for this week’s cover story on Neuralink. He’s reported on a robot brain-surgeon, an impatient Musk and a surreal scenes of smoothie-sipping, brain-chipped monkeys.

Musk has reshaped an entire industry, and this one could be the most transformative of all. This bonus episode of Elon, Inc. is hosted by David Papadopoulos. He’s joined by Vance and technology reporter Sarah McBride. Read the cover story here.