NOVA: Season 31

Episode 1: Infinite Secrets 2003-09-30 | 55 min A battered manuscript turns up after 1000 years revealing the mind of the Greek genius Archimedes

Episode 2: Who Killed the Red Baron? 2003-10-07 | 55 min Forensic experts investigate the most famous aviation mystery of World War 1.

Episode 3: The Elegant Universe: Einstein's Dream (1) 2003-10-28 | 55 min Part 1, "Einstein's Dream," introduces string theory and shows how modern physics—composed of two theories that are ferociously incompatible—reached its schizophrenic impasse: One theory, general relativity, successfully describes big things like stars and galaxies, while another, quantum mechanics, is equally successful at explaining small things like atoms and subatomic particles. Albert Einstein, the inventor of general relativity, dreamed of finding a single theory that would embrace all of nature's laws. But in this quest for the so-called unified theory, Einstein came up empty-handed, and the conflict between general relativity and quantum mechanics has stymied all who've followed. That is, until the discovery of string theory.

Episode 4: The Elegant Universe: String's the Thing (2) 2003-10-28 | 55 min Part 2, "String's the Thing," opens with a whimsical scene in a movie theater in which the history of the universe runs backwards to the Big Bang, the moment at which general relativity and quantum mechanics both came into play, and therefore the point at which our conventional model of reality breaks down. Then it's string theory to the rescue as Greene describes the steps that led from a forgotten 200-year-old mathematical formula to the first glimmerings of strings—quivering strands of energy whose different vibrations give rise to quarks, electrons, photons, and all other elementary particles. Strings are truly tiny, being smaller than an atom by the same factor that a tree is smaller than the solar system. But, as Greene explains, they are able to combine the laws of the large and the laws of the small into a proposal for a single, harmonious theory of everything.

Episode 5: The Elegant Universe: Welcome to the 11th Dimension (3) 2003-11-04 | 55 min Part 3 of "The Elegant Universe” with host Brian Greene shows how Edward Witten of Princeton's Institute for Advanced Study, aided by others, revolutionized string theory by successfully uniting the five different versions into a single theory that is cryptically named "M-theory," a development that requires a total of eleven dimensions. Ten...eleven...who's counting? But the new 11th dimension implies that strings can come in shapes called membranes, or "branes" for short. These have truly science fiction-like qualities, since in principle they can be as large as the universe. A brane can even be a universe—a parallel universe—and we may be living on one right now.

Episode 6: Wright Brothers' Flying Machine 2003-11-11 | 55 min Relive the engineering challenges that two bicycle makers overcame to become the first in flight.

Episode 7: Magnetic Storm 2003-11-18 | 55 min Is the magnetic field protecting Earth from deadly radiation about to reverse direction or even dissapear?

Episode 8: Volcano Above the Clouds 2003-11-25 | 55 min Join a scientific expedition to the glacier-capped summit of Kilimanjaro, Africa's tallest mountain.

Episode 9: MARS Dead or Alive 2004-01-04 | 55 min Go inside NASA's risky field trip to the red planet in this tense and dramatic behind-the-scenes chronicle of the $820 million Mars Exploration Rover (MER) project.

Episode 10: Secrets of the Crocodile Caves 2004-01-20 | 55 min Rare lemurs and crocodiles with bizarre cave-dwelling behavior draw scientists to remote corner of Madagascar.

Episode 11: Dogs and More Dogs 2004-02-03 | 55 min NOVA goes beyond the wagging tails and floppy ears to reveal surprising insights into the origin and evolutionary strategy of our canine companions. From a wolf research facility in rural Indiana to New York’s Westminster Dog Show, you’ll discover some amazing dog facts. Did you know the Saluki can beat any other mammal on earth in a three-mile race? That dogs developed spots for a specific reason? And that their evolution is helping us learn about our own?

Episode 12: Descent Into the Ice 2004-02-10 | 55 min A team of "glacionauts" verntures into a labyrinth of unexplored and hazardous glacier caves on France's Mt. Blanc.

Episode 13: Crash of Flight 111 2004-02-17 | 55 min One of the most exhaustive investigations in aviation history reveals telling clues to the cause of a dissaster off Nova Scotia.

Episode 14: Life and Death in the War Zone 2004-03-02 | 55 min While other reporters were embedded in fighting units during the Iraq War, NOVA was covering the emergency medical response, living night and day with the doctors, nurses, and medics in a frontline Combat Support Hospital (CSH). The program captures a period of the conflict in April and May of 2003 when CSH units faced a deluge of injured Iraqi soldiers and civilians who had little support from their country's collapsed health-care system.

Episode 15: Hunt for the Supertwister 2004-03-30 | 55 min Scientists, meteorologists and storm chasers try to uncover the secrets of F5 tornadoes, the largest, most powerful and most dangerous on Earth. Included are looks at how funnels form and the devastating 2003 tornado in Moore, Oklahoma, plus "tornado tourists," who pay companies to take them to the ferocious phenomena to see them first-hand.

Episode 16: World in the Balance: The People Paradox (1) 2004-04-20 | 55 min Nova investigates the impact of forces that are radically changing populations in both rich and poor nations.

Episode 17: World in the Balance: China Revs Up (2) 2004-04-20 | 55 min Nova investigates the impact of forces that are radically changing populations in both rich and poor nations.

Episode 18: Battle Plan Under Fire 2004-05-04 | 55 min Can the US military's high tech weaponry prevail against insurgants.

NOVA: Season 31

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