Alan Alda has issued this year’s challenge to the world’s top scientists: What is sound? In an action-packed hour of interactive demonstrations, Alan and a team of communication experts invite the audience to explore what we hear, how we hear, and what that means for different species.

We make tools. It defines us. But since the first proto-human tied a stick to a stone, tools have also been making us. Join our panel of philosophers, anthropologists, and …

What we touch. What we smell. What we feel. They’re all part of our reality. But what if life as we know it reflects only one side of the full story? Some of the world’s leading physicists think that this may be the case.

Nowadays, the tools for tracing your family tree have advanced far beyond looking back at names in the family Bible or compiling a scrapbook of paper records. Using your genetic information to find long-lost relatives is easier and cheaper than ever before—and scientists are looking to push the technology even further by analyzing our skin and facial features.

Neuroscientist André Fenton’s fascination with the human brain led him to study how we interpret the world. Check him out as he leads a group of students through interactive games …

Does our intelligence, creativity, or consciousness make us unique? Brian Greene sits down with Nick Bostrom, author of Superintelligence and Deep Utopia, to explore how AI systems are already reshaping …