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.

Amber Straughn brings you on her journey from the big sky of her hometown in Arkansas to studying astrophysics at NASA and demonstrates the infrared technology that will be crucial …

Some music makes you dance and other music makes you cry. Concert-trained pianist Elizabeth Hellmuth Margulis became a cognitive scientist to learn why. Episode filmed live at the 2019 World …

Nobel Laureate Barry Barish and Brian Greene discuss the quickly-evolving world of gravitational waves detections—from the first detection on September 14, 2015 to its public announcement five months later through …

We live in the era Big Data. Its algorithms pervade our lives–shaping our purchases, our finances, our health care, our education, our communities, our public policy. Armed with phones, computers, …

Albert Einstein shattered previous ideas about time, but left many pivotal questions unanswered: Does time have a beginning? An end? Why does it move in only one direction? Is it real, or something our minds impose on reality?