Andrew Strominger, renowned for his work on black holes, string theory, and quantum gravity, joins Brian Greene to describe his latest results and how some of them may be testable …

Black holes may hold the key to understanding the most fundamental truths of the universe, but how do you see something that’s, well, black? Astronomers think they have the answer. …

What is time? Isaac Newton described it as absolute, but Einstein proved that time is relative, and, shockingly, that time and space are intricately interwoven. Now recent work in string theory and quantum gravity suggests that space and time may not be fundamental. If this is true, what new picture of reality will emerge?

What makes Mona Lisa’s smile so intriguing? What makes Picasso’s portraits so compelling? Kurt Andersen hosts artists Chuck Close and Devorah Sperber, with neuroscientists Margaret Livingstone, Chris Tyler and Ken Nakayama, as they examine the power of brain imaging technology to illuminate how we perceive the most intimate yet public of features, the human face.

Are the laws of physics real, or are they human inventions? This is one of many questions Brian Greene and Sean Carroll explore at the very edge of understanding, where …

The multiverse hypothesis, suggesting that our universe is but one of perhaps infinitely many, speaks to the very nature of reality. Join physicist Brian Greene, cosmologists Alan Guth and Andrei Linde, and philosopher Nick Bostrom as they discuss and debate this controversial implication of forefront research.