A field expedition to collect new fossil clues on Alaska's North Slope reveals details of the lives of polar dinosaurs.

An investigation uncovers the human failures and design flaws behind the 2003 Columbia tragedy.

Join Mark Everett on his quixotic quest to understand his father Hugh, creator of a radical theory of quantum physics.

Fractals are more than just pretty pictures. These simple but sophisticated equations describe the world we live in, from forest growth patterns to the beating of a human heart, and they are inspiring new investigation in myriad fields of science and technology.

The 2004 discovery of tiny human fossil bones on the island of Flores, Indonesia, raised new—and controversial—speculation about the history of the human race. Ever since, scientists have been scrambling to find more information about these "hobbits."

“The Bible’s Buried Secrets,” produced by Rhode Island-based Providence Pictures for PBS's science series Nova, attempts to uncover who wrote the Hebrew Bible and whether it’s history or parable, delving into the origins of the Israelites to explore their gradual transformation into a monotheistic people.

The show also poses provocative ideas – including the “revelation” that many Israelites believed that God had a wife – and disputes literal readings of the text.

With a passion that will leave few viewers unmoved, veterinarians and volunteers at California\'s Marine Mammal Center work to rescue and rehabilitate a variety of marine mammals, including harbor seal pups and California sea lions.

NASA's twin robot explorers, Spirit and Opportunity, have endured the worst Martian storm ever recorded and survived near-fatal glitches—yet continue to operate. Now they're joined on the Red Planet by NASA's Phoenix probe, which has already made significant discoveries of its own.

Can California's ambitious plan to cut greenhouse gases actually succeed?

Follow the 2,000-mile migration of monarchs to a sanctuary in the highlands of Mexico.

NOVA investigates the high-tech eavesdropping carried out by the National Security Agency and the effectiveness of surveillance in an age of terrorism.

Scientists explore the precise cyclical way in which the rat population explodes every half-century in a remote bamboo forest of India.

In collaboration with National Geographic, NOVA follows the exploits of acclaimed photojournalist James Balog and a scientific team as they deploy time-lapse cameras in risky, remote locations in the Alps and Arctic, including Alaska and Greenland. Grappling with blizzards, fickle technology, and climbs up craggy precipices, the team must anchor cameras capable of withstanding subzero temperatures and winds up to 170 miles per hour. In this high-action scientific adventure, NOVA and National Geographic investigate the mystery of the mighty ice sheets, whose still-unknown behavior will affect the fate of coastlines around the world.

What killed the mammoths? Near the end of the last ice age 13,000 years ago, these mighty beasts disappeared from North America together with some 35 other groups of mammals, including giant ground sloths, saber-tooth cats, and American lions. For four decades, debate has raged over the cause of their abrupt demise. In Last Extinction, NOVA presents an exclusive in-depth investigation of a bold and controversial new hypothesis, which suggests that a massive impact from space could be the culprit. According to the theory, an incoming comet broke up over North America in a devastating series of explosions, causing widespread forest fires and wiping out plants, animals, and prehistoric people. The evidence comes from a mysterious black mat layer discovered at more that fifty sites across the continent. The black mat contains exotic materials including rare microscopic nanodiamonds that are claimed to be the signature of an extraterrestrial impact. But other scholars question the evidence and argue that ancient hunters armed with a lethal stone weapon the Clovis spear point drove the giant beasts into oblivion. Still others believe the unstable climate at the end of the Ice Age was responsible. NOVA explores the dramatic new evidence of a cosmic explosion and the possibility that all three explanations may be correct.

Seven doctors, 21 years... Saving lives is only part of the story.

Seven doctors, 21 years... Saving lives is only part of the story.

An exploration of the effect of music on the brain via four case studies from neurologist Oliver Sacks book "Musicopia" and the MRI visualizations from Sacks' own brain as classical music is played, including Bach's "Mass in B Minor." Study subjects include a man with Tourettes syndrome who has found relief while playing the drums; an autistic savant who is simply dazzling on the piano; a woman who suffers the inability to process music, known as amusia; and a surgeon whose life changed after being struck by lightning.