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).

The force behind scientific progress is the simple act of asking questions. This episode, TED speakers explore how a deeper and more humble style of inquiry may help achieve the next big breakthrough.

Where do stereotypes come from? Why do some perceptions persist, and is there any truth or value to the assumptions we make? In this hour, TED speakers examine the consequences of stereotypes. (Original broadcast date: November 14, 2014)

We expect a lot of our doctors, but they don't always have the best tools to treat us. This episode, TED speakers explore new ways to think about disease, diagnosis, and the delicate art of healing.

When we go online, we present a digital version of ourselves. How do we transform when we interact inside our screens? In this episode, TED speakers explore the expanding role of our "second selves." (Original broadcast date: September 18, 2015).

It's normal for us to always be glued to our screens. So how are they changing us, and how will they shape our future? This hour, TED speakers explore our ambivalent relationships with our screens. (Original broadcast date: September 11, 2015).

The five senses shape all our experience, but we still don't fully understand them. This episode, TED speakers explore how our brains make sense of sensation, and how our minds manufacture "reality."