(Program not available for streaming.) Between the blue sky above and the infinite blackness beyond lies a frontier that scientists have only just begun to investigate. In "At the Edge of Space," NOVA ...

(Program not available for streaming.) Fifty years later, what can science tell us about the Kennedy assassination—and the investigations that followed? The 1963 murder, in broad daylight in front of ...

From the PBS science series NOVA, a biweekly podcast digging into the science behind the headlines. Alok Patel takes you behind the scenes with the people—scientists, engineers, technologists, ...

Diseases that were largely eradicated in the United States a generation ago—whooping cough, measles, mumps—are returning, in part because nervous parents are skipping their children's shots. NOVA's ...

(This program is no longer available for online streaming.) "Earth From Space" is a groundbreaking two-hour special that reveals a spectacular new space-based vision of our planet. Produced in ...

Could a gene that doubles the lifespan of tiny worms help extend human lives, too? In Hawaii, a group of exceptionally healthy elderly men—who just so happen to share a genetic link to those ...

Obi-Wan Kenobi used it to get his droids past policing stormtroopers in Star Wars. But now the thrilling, terrifying prospect of controlling another's mind using invisible forces is stepping out of ...

Photosynthesis in plants and a few bacteria is responsible for feeding nearly all life on Earth. It allows energy from the Sun to be converted into a storable form, usually glucose, which plants use ...

What would it mean if we found cellulose in salt deposits on Mars just like those found in salt crystals here on Earth? For planetary geologist Phil Christensen, it would say one thing: "Wow, Mars had ...

Neurologist Jeffrey Ellenbogan of Harvard Medical School conducts research exploring just how critical sleep may be to the training and performance of doctors. Neil deGrasse Tyson visits Ellenbogan's ...

The entrepreneurs and engineers at LiftPort Group in Bremerton, Washington think space elevators aren't just a wild idea. Indeed, they've staked their corporation on the concept. In this video, join ...

(This video is no longer available for streaming.) Prime numbers—those that can only be divided by themselves and one—bear a mystery. Why do primes tend to pair up? Five and seven, for example, are ...