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.

Award-winning writers take the stage to share their quirky, engrossing, and sometimes shocking insights about human anatomy and social psychology. Mary Roach, widely regarded as one of the country’s greatest …

Archaeologists Hannah Morris and Becca Peixotto tell the story of their efforts to uncover remains of a new species of human relatives that are over 200,000 years old in South …

Ever wondered how many neurons are in the human brain? Meet Suzana Herculano-Houzel, a professor at Vanderbilt University whose pioneering “brain soup” technique made it possible to accurately count the …

Biomedical and forensic anthropologist Angelique Corthals travels the world uncovering 3,000 year old fossils and more in her exciting job to unearth mysteries of mummies. Episode filmed live at the …

Car accidents. Suicide bombers. Earthquakes. Death of a spouse. Why do some people bounce back from traumatic events while others do not? Is there a biological profile of resiliency?