We spend a third of our lives asleep. Every organism on Earth—from rats to dolphins to fruit flies to microorganisms—relies on sleep for its survival, yet science is still wrestling with a fundamental question: Why does sleep exist?

Stephen Wolfram joins Brian Greene to explore the computational basis of space, time, general relativity, quantum mechanics, and reality itself. This program is part of the Big Ideas series, supported …

Computers are getting smarter and more creative, offering spectacular possibilities to improve the human condition. There’s a call to redefine Artificial Intelligence as Augmented Intelligence, to emphasize the potential of …

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 …

Brian Greene and Nobel Laureate Frank Wilczek discuss quantum mechanics, dark matter, cosmology, consciousness, and Wilczek’s new book, “Fundamentals: Ten Keys to Reality.” This program is part of the Big …

Join a physicist, a neuroscientist, and a linguist as they explore the deep enigmas of time. Time feels like it flows, but does it? Time seems to have a built-in …