A universe that continually expands has long been the dominant cosmological framework. But a universe that undergoes cycles of expansion and contraction, perhaps for all time, has recently been analyzed …

Winners of the prestigious $1 million Kavli Prizes were announced May 31, 2012 live via satellite from the Norwegian Academy of Science and Letters in Oslo.

Every generation benefits from the insights and discoveries of the generations who came before. “If I have seen a little further it is by standing on the shoulders of giants,” wrote Isaac Newton. In a special series, the World Science Festival invites audiences to stand on the shoulders of modern-day giants.

Marcia Bartusiak joins Kip Thorne, Laura Danly and Rainer Weiss to demonstrate how two observatories on opposite sides of the country, called LIGO (Laser Interferometer Gravitational-wave Observatory), may open a new window on observing the cosmos—one based not in light but in gravity.

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?

Bestselling author and religious historian Karen Armstrong joined Brian Greene for a conversation exploring humankind’s evolving relationship with the Earth, life, and the cosmos. To save ourselves and the planet, …