Matt Walker is a sleep scientist at Berkeley, author of Why We Sleep, and the host of a new podcast called The Matt Walker Podcast. Please support this podcast by checking out our sponsors: – Stamps.com: https://stamps.com and use code LEX to get free postage & scale – Squarespace: https://lexfridman.com/squarespace and use code LEX to get 10% off – Athletic Greens: https://athleticgreens.com/lex and use code LEX to get 1 month of fish oil – BetterHelp: https://betterhelp.com/lex to get 10% off – Onnit: https://lexfridman.com/onnit to get up to 10% off EPISODE LINKS: Matt’s Podcast: https://themattwalkerpodcast.buzzsprout.com/ Matt’s Twitter: https://twitter.com/sleepdiplomat Matt’s Instagram: https://www.instagram.com/drmattwalker