SCIENCE

Arctic Wolf Pack

Nature

Arctic Wolf Pack

At the very northern edge of North America is Ellesmere Island, where the unforgiving Arctic winds tear through the tundra, dipping temperatures to 40 below zero. Running through this shifting sea of snow and ice is one of the most hardened predators on the planet, the White Wolf.

Black Hole Apocalypse – Part 1 and 2

NOVA

Black Hole Apocalypse – Part 1 and 2

Black holes are the most enigmatic, mysterious, and powerful objects in the universe. Anything that falls into them vanishes. Astrophysicist and novelist Janna Levin takes viewers on a journey to the frontiers of black hole science and explores what can they tell us about the nature of space, time, and gravity.

The Day the Dinosaurs Died

Nova

The Day the Dinosaurs Died

66 million years ago, a seven-mile-wide asteroid collided with Earth, triggering a chain of events that coincide with the end of the dinosaurs. But experts have long debated exactly what happened when the asteroid struck and how the giant beasts met their end. Now, scientists have uncovered compelling new clues about the catastrophe.

Nature: The Cheetah Children

Nature

Nature: The Cheetah Children

For nearly two years in the forested hills of Zimbabwe, wildlife cameraman Kim Wolhuter shadowed a wild cheetah family on foot, to reveal in intimate detail the cubs’ remarkable journey to adulthood and their mother’s dedication in raising them.

The Solar Eclipse, the Great Man o’ War, and Mammoth Cave!

Kentucky Life

The Solar Eclipse, the Great Man o’ War, and Mammoth Cave!

The community of Hopkinsville came together to support thousands coming to view 2017's Great American Eclipse; learn more about the science courtesy of the Franklin drive-in and the scientists and eclipse enthusiasts who came to Simpson County to view it; Doug and the Kentucky Horse Park celebrate the birthday of Man o'War as 2017 is the 100th anniversary of his birth; and before European settlement, native peoples made extensive use of Mammoth Cave.

NOVA: Secrets of the Shining Knight

NOVA

NOVA: Secrets of the Shining Knight

Once upon a time, knighthood was serious business, and for countless medieval fighters, their armor was what stood between life and death. NOVA challenged a blacksmith and master armorer to recreate parts of an elite armor. We trace their journey as they rediscover centuries-old metalworking secrets, then put their new armor to the ultimate test against a period musket.

Nature: Naledi – One Little Elephant

Nature

Nature: Naledi – One Little Elephant

Born in a rescue camp in the wilderness of Botswana, an orphaned elephant is helped by a team of caretakers and researchers.

Secretary Elaine Chao on Transportation Issues

Connections with Renee Shaw

Secretary Elaine Chao on Transportation Issues

Renee's guest is U.S. Department of Transportation Secretary Elaine Chao. Sec. Chao discusses topics in the transportation sector, including the prospect of self-driving car technology, the agency's involvement in the disaster relief effort for Hurricanes Harvey and Irma, and other issues. The wide-ranging interview also touches on Sec. Chao's views on immigration and the relationship between her husband, Sen. Majority Leader Mitch McConnell (R-KY) and President Donald Trump.

NOVA: Death Dive to Saturn

Nova

NOVA: Death Dive to Saturn

For more than 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.