For over a decade, the Cassini space probe has been sending dazzling images of Saturn's breathtaking rings and mysterious moons. Join Nova on a suspenseful ride during Cassini's final hours as it dives into Saturn's atmosphere.

Discover what it was like to be a knight in shining armor and follow the historic manufacturing process. Master armorers re-engineer the Greenwich armor - considered some of the greatest armor ever made - and then put it to the test.

Who built Stonehenge and why? Groundbreaking archaeological digs have revealed major new clues about Britain's enigmatic 5,000-year-old site and the people who constructed it.

For nearly 500 years, Beijing's complex of palaces and temples was the power center of imperial China. Explore this ancient architectural masterpiece, long hidden from western eyes, as experts use ancient craft secrets to restore its fading grandeur.

Volcanologists search for an elusive volcanic mega-eruption that plunged the medieval earth into a deep freeze. Investigate the geologic evidence from Greenland all the way to Antarctica to identify the 750-year-old culprit.

Researching the Great Hurricane of 1780, which blasted its way across the Caribbean, why it was so dangerous and the potential for more mega-storms in the future.

Efforts to uncover the geologic footprints of colossal megafloods in Iceland and on the seabed of the English Channel.

Why some animals have extreme armaments, including claws, horns, fangs and stings.

Scientists test avian aptitude with brainteasers that reveal acute intelligence.

Scientists discover new clues as to the catastrophe that ended the reign of the dinosaurs on Earth.

Black holes are the most enigmatic and exotic objects in the universe. They’re also the most powerful, with gravity so strong it can trap light. And they’re destructive, swallowing entire planets, even giant stars. Anything that falls into them vanishes... gone forever. Now, astrophysicists are realizing that black holes may be essential to how our universe evolved - their influence possibly leading to life on Earth and, ultimately, us. In this two-hour special, astrophysicist and author Janna Levin takes viewers on a journey to the frontiers of black hole science. Along the way, we meet leading astronomers and physicists on the verge of finding new answers to provocative questions about these shadowy monsters: Where do they come from? What’s inside? What happens if you fall into one? And what can they tell us about the nature of space, time, and gravity?

For the first time, two intrepid pilots fly a solar-powered airplane around the world.