Now, with the help of new spacecraft and Earth-based telescopes, scientists are seeing the Sun as they never have before and even re-creating what happens at the very center of the Sun. Their work will help us understand aspects of the sun that have puzzled scientists for decades. Secrets of the Sun reveals a bright new dawn in our understanding of our nearest star, one that might help keep our planet from going dark.

Looks at the scientists striving to understand the forces at work behind last year's tornado outbreak. Could their work improve tornado prediction in the future? Nova also talks to people whose lives have been upended by these extreme weather events in an effort to learn how we all can protect ourselves and our communities for the future.

In a special 4-hour investigation, Frontline tells the inside story of the struggles to rescue and repair a shattered economy, exploring key decisions, missed opportunities, and the unprecedented and uneasy partnership between government leaders and titans of finance that affects the fortunes of millions of people around the world.

Packed with ingenious scientific work and spectacular fossils, Nova's Ice Age Death Trap reveals intimate secrets of the life and death of North America's most exotic and extreme creatures: mastodons, saber tooth cats and camels, giant bison with six-foot horns, and ground sloths as big as elephants. Most tantalizing of all, the excavation, organized by the Denver Museum of Nature and Science, unearths startling and controversial evidence of what...