Nova

- Season 29

(2002)

Astronomers struggle for decades to determine where gamma ray bursts are coming from unsure whether they are nearby or half way across the universe. Once that is pinned down an even bigger question arises, what could possibly produce them.

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In late 1914, Sir Ernest Shackleton set forth for Antarctica with 27 men, determined to be the first man to cross the continent from coast to coast. His ship, the Endurance, became trapped in pack ice just short of the continent. When the ice crushed their ship to splinters, they were left stranded on the ice floes. Shackleton resolved to rescue each and every man, and turned disaster into one of the greatest survival stories of all time.

Film on the mechanism of collapse of the World Trade Center.

In 2000, one of the most destructive fire seasons ever, uncontrollable blazes raged across the American West, scorching more than 6 million acres. Among those battling the flames were the Arrowhead Hotshots, an elite firefighting crew whose skill and bravery helped stamp out the inferno. This program joins the team for an up-close look at the war on wildfires and examines the fire suppression policies that may lead to such costly catastrophes.

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Two scientists studying the legendary Carlsbad Caverns come to question the conventional wisdom of how the massive caves system formed. They propose a new theory that extremophile bacteria producing hydrogen sulfide, a precursor to sulfuric acid, are the main cause of the caves formation rather than geological processes.

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In this two-hour special, NOVA celebrates the story of the father of modern science and his struggle to get Church authorities to accept the truth of his astonishing discoveries. The program is based on Dava Sobel's bestselling book, Galileo's Daughter, which reveals a new side to the famously stubborn scientist-that his closest confidante was his illegitimate daughter, Sister Maria Celeste, a cloistered nun.

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Experts struggle to save the City of Canals before it vanishes beneath the waves.

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