We’ve used electricity to treat our brains for thousands of years, from placing electric fish on our heads to cure migraines to using electroconvulsive therapy to alleviate depression. But over time, our focus has shifted from restoring health to augmenting our abilities. Should we be wearing battery-powered caps to improve our concentration, or implanting electricity-emitting devices to expand our thinking capacity? Guests include: Brian Johnson, CEO of Kernel.

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