Why do some days fly by, while others never seem to end? Have we been stuck in a time warp since March 2020? CNN’s Chief Medical Correspondent Dr. Sanjay Gupta talks to astronaut Christina Koch about how her perception of time changed during her 11 months in space – the single longest spaceflight by a woman. Plus, we hear from an experimental psychologist about why our time perception has felt so off in the pandemic, and a philosopher shares the secret to “mental time travel” ... no time machines required!

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