What makes an idea, a brand, or a behavior catch fire? This hour, TED speakers explore the mysteries behind the many things we spread: laughter and sadness, imagination, viruses and viral ideas. TED speakers include Microsoft founder Bill Gates, neuroscientist Sophie Scott, entrepreneur and blogger Seth Godin, physician and social scientist Nicholas Christakis, and historian Yuval Harari. (Original Broadcast Date: March 04, 2016)

What allows us to endure our darkest moments? What does it take to show resilience in the face of adversity? In this hour, TED speakers explore the outer limits of inner strength. (Original Broadcast Date: February 11, 2016).

As machine learning surpasses human intelligence, where does that leave us? This hour, TED speakers explore ideas about the exciting and terrifying future of human-robot collaboration.

In this hour, TED speakers explore our origins as a species — who we are, where we come from, where we're headed — and how we're connected to everything that came before us. (Original Broadcast Date: October 24, 2014).

Whether it's asking for a raise or asking for equality, speaking up can be risky — even dangerous. This hour, TED speakers share ideas and stories about taking the crucial step to say something.

Cities are among our greatest experiments in human co-habitation. Do they also hold the answers to some of our biggest problems? This hour, TED speakers explore how cities can change the world. (Original Broadcast Date: January 08, 2016).

Humans have a capacity to laugh even in the hardest of times. This hour, TED speakers describe how they use humor as a weapon and a shield, to ward off doubt, discrimination, and even depression.

The era of open source has led to countless innovations. When does it work and when is it chaos? In this episode, TED speakers explore how open source is changing how we build, collaborate and govern. (Original Broadcast Date: October 23, 2015).

Whether you're choosing spaghetti sauce or a life partner, making decisions can be paralyzing. This hour, TED speakers explore how we make the choices we make, and how we learn to live with them.

We communicate with each other in all sorts of ways. In this hour, TED speakers reflect on how words and methods of communication affect us, more than you might expect. (Original Broadcast Date: December 13, 2013).