Arianna sits down for a deep conversation with fellow podcast host and “Human Guinea Pig” Tim Ferriss. The author, speaker, investor and productivity guru is the author of four #1 best-selling books—most recently, Tribe of Mentors. Arianna and Tim delve into several topics ranging from mental health and mindset to stoicism and being fearless. The Thrive Global Podcast is brought to you by Sleep Number (sleepnumber.com/Thrive).