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.

Ecologist and explorer Mark Moffett has trekked across the globe to document new animal species and behaviors. Just like the creatures he studies, Mark can be found crawling in the …

Fred Kavli, a Norwegian-born U.S. citizen, was a physicist, entrepreneur, business leader, innovator and philanthropist dedicated to supporting research and education that has a positive, long-term impact on the human …

Invention and innovation are the mark of robotics engineer Dennis Hong’s lab. Watch as he demonstrates some of the remarkable robots that his team has built. The robots walk on …

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.

We make tools. It defines us. But since the first proto-human tied a stick to a stone, tools have also been making us. Join our panel of philosophers, anthropologists, and …