Sexuality and gender play a profound role in shaping identity, but for much of human history how they are determined has remained obscure. How does sexual orientation develop? What is it? Can it be changed?

Physicist and mathematician Brian Greene and journalist Faith Salie explore the past and future of the cosmos – from the big bang to the closest science can take us to the very end – …

Evolutionary paleogeneticist Beth Shapiro travels to the cold reaches of the world to find DNA samples of long extinct animals, such as mastodons and saber-toothed tigers. She hopes to learn …

Renowned astrophysicist and educator Alex Filippenko joins Brian Greene to discuss an increasingly disturbing cosmological mismatch known as the Hubble Tension, a gap that may require a radical rewriting of …

Harvard professor and 2017 Breakthrough prize winner in Fundamental Physics, Cumrun Vafa joins Brian Greene for a discussion on the past and future of string theory and how puzzles ignited …

Computer scientist Jasmine Lawrence’s Cool Job is solving problems: She connects families thousands of miles apart through new Facebook technology, runs a blood donation network, and started her own personal …