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.

This video is part of our Brilliant Breakthroughs series: our new 20-episode mini-series exploring the “Eureka!” moments and proud accomplishments of the greatest scientific minds of our time. Join us …

What if your brain at 77 were as plastic as it was at 7? What if you could learn Mandarin with the ease of a toddler or play Rachmaninoff without …

Zoologist Jarod Miller has traveled the world and encountered countless members of the animal kingdom. Meet a fennec fox, a kinkajou, and a lemur and learn about the special traits …

Mathematics has an uncanny ability to describe the physical world. It elegantly explains and predicts features of space, time, matter, energy and gravity. But is this magnificent scientific articulation an …

With his General Theory of Relativity, Einstein illuminated the grand expanse of the cosmos, but he was also instrumental in developing quantum mechanics for describing the microworld. In Einstein’s day, …