As we transition to our new host Manoush Zomorodi, Guy Raz looks back on some of his favorite episodes from his seven years hosting the TED Radio Hour. This episode originally aired on June 27, 2014. When is copying flattery, when is it thievery, and when is it sheer genius? In this hour, TED speakers explore how sampling, borrowing, and riffing make all of us innovators.

As we transition to our new host Manoush Zomorodi, Guy Raz looks back on some of his favorite episodes from his seven years hosting the TED Radio Hour. This episode originally aired on June 19, 2015. We live our lives by the calendar and the clock, but time is also an abstraction, even an illusion. In this hour, TED speakers explore how our sense of time changes depending on who and where we are.

As we transition to our new host Manoush Zomorodi, Guy Raz looks back on some of his favorite episodes from his seven years hosting the TED Radio Hour. This episode originally aired on March 6, 2015. Math intimidates a lot of us, but it can deliver surprising answers to life's pressing questions. In this episode, TED speakers discuss the elegant simplicity, and giddy complexity, of solving for X.

As we transition to our new host Manoush Zomorodi, Guy Raz looks back on some of his favorite episodes from his seven years hosting the TED Radio Hour. This episode originally aired on March 8, 2013. Gazing up at the night sky is simultaneously humbling and utterly thrilling. This hour, we'll hear from TED speakers who share an infectious sense of wonder and curiosity about our place in the universe and what lies beyond our skies. Guests include physicist Brian Greene, writer Phil Plait and astronomer Jill Tarter.

As we transition to our new host Manoush Zomorodi, Guy Raz looks back on some of his favorite episodes over the past seven years. This episode originally aired on October 3, 2014. We want to be creative but channeling our creative impulses is no small feat. Is creativity something we are born with or can we learn it? In this hour, TED speakers examine the mystery of creativity. Guests include musician Sting, neuroscientist Charles Limb, author and educator Sir Ken Robinson, and writer Elizabeth Gilbert.

Life is full of moments that shape us — and if we're lucky, we might pick up some wisdom along the way. In host Guy Raz's final episode, TED speakers share some of the life lessons they've learned. Guests include writer Pico Iyer, financial literacy advocate Curtis "Wall Street" Carroll, and neuroscientist Indre Viskontas.