Dark energy is cosmology’s biggest mystery—an anti-gravitational force that confounds the conventional laws of physics. It makes up more than two-thirds of the cosmos, but science is still grappling to explain what dark energy actually is.

“The infinite! No other question has ever moved so profoundly the spirit of man,” said David Hilbert, one of the most influential mathematicians of the 19th century. A subject extensively studied by philosophers, mathematicians, and more recently, physicists and cosmologists, infinity still stands as an enigma of the intellectual world.

What happens when a simple mistake becomes a huge scientific discovery? You end up with a substance 100x stronger than a man of steel!  

What we touch. What we smell. What we feel. They’re all part of our reality. But what if life as we know it reflects only one side of the full story? Some of the world’s leading physicists think that this may be the case.

Renowned physicist and pioneer of string theory, Leonard Susskind talks with Brian Greene about some of the biggest breakthroughs in physics. Listen to their wide-ranging conversation about the holographic principle, …

Psychologist Paul Bloom joins Brian Greene for a spirited exploration of consciousness, memory, empathy, free will, and the elusive workings of the human mind. This program is part of the …