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	18 Ways to Make a Baby Investigate the brave new world of assisted reproduction.

	Ancient Refuge in the Holy Land Israel's remote Cave of Letters holds clues to a Jewish uprising against the Romans.

	NOVA scienceNOW: Art Authentication See how clever computer algorithms can distinguish a master fake from a masterpiece.

	Astrospies An elite corps of secret U.S. astronauts is trained to gather intelligence on the Soviets during the Cold War.

	NOVA scienceNOW: Auto-Tune Can't carry a tune? Andy Hildebrand's pitch-correction software can help you sing like a star.

	Balloon Race Around the World Delve into the history and science of ballooning, and follow some of the attempts in the '90s to be the first to circumnavigate the globe.

	Battle Alert in the Gulf Strategy makers, fighter pilots, Aegis cruiser captains, and fast-attack submarine crews contend with a hostile Iraq.

	Battle of the X-Planes Two aviation giants, Lockheed Martin and Boeing, compete to build the next-generation fighter jet.

	Battle Plan Under Fire Can the U.S. military's high-tech weaponry prevail against insurgents?

	Beast of Loch Ness, The Scientists employ state-of-the-art sonar and cameras in an attempt to locate the elusive Loch Ness Monster.

	Bioterror Explore germ warfare's chilling past, present, and future.

	Bomb Squad IRA terrorists and British bomb disposal experts tell insider stories of a deadly cat-and-mouse game.

	Bombing of America Forensic scientists search for clues hidden within the chaos of crime scenes to help law enforcement find the Unabomber.

	Car of the Future Join the 'Car Talk' guys as they hit the road in search of a new breed of clean, fuel-efficient vehicles.

	NOVA scienceNOW: CERN Beneath the Alps, the mother of all particle accelerators nears completion.

	Cut to the Heart Ever since World War II, physicians have struggled to find ways to treat heart failure, the biggest killer in the modern world.

	Decoding Nazi Secrets Allied technologies developed at Britain's Station X helped halt the onslaught of the Third Reich and set the stage for today's computers.

	Diamond Deception Makeshift labs in China and Russia are turning out synthetic gemstones that rival natural diamonds.

	Dirty Bomb Radiation experts play out a frightening terrorist scenario—exploding a bomb laden with radioactive materials.

	Electric Heart Pioneering surgeons test artificial hearts in the hope of saving the lives of people with coronary heart disease.

	Escape! Engineers learn from past disasters to make fires and car, plane, and ship accidents increasingly survivable.

	Fall of the Leaning Tower An international committee of engineers and architects race to prevent the toppling of Pisa's famous monument.

	NOVA scienceNOW: Profile: Hany Farid This self-proclaimed "accidental scientist" is a digital detective inventing new ways to tell if photos have been faked.

	Faster than Sound Top test pilots describe the dangers, mysteries, and thrill of being the first to fly at supersonic speed.

	Fireworks! Pyrotechnists use hi-tech firing systems and ancient alchemy to create dazzling fireworks displays.

	The Great Robot Race Driverless vehicles compete in a 130-mile race across the Mojave Desert.

	Harvest of Fear Genetically modified foods—a wondrous advance or a new threat? Explore the growing controversy.

	Hitler's Lost Sub A fisherman's net snags off the coast of New Jersey, revealing a missing World War II German U-boat.

	Hunt for the Supertwister Tornado-chasing scientists with an eye to better forecasting risk their lives to plumb the secrets of nature's most terrifying killer.

	Kaboom! Explore the science of explosions - from fireworks to building demolitions.

	Killer Disease on Campus Doctors combat the deadliest form of meningitis, which strikes young people out of the blue.

	Leopards of the Night NOVA's state-of-the-art camera equipment reveals the nocturnal hunting behavior of leopards in Zambia's Luangua Valley.

	Lincoln's Secret Weapon The Navy undertakes a risky project to salvage the USS Monitor, an innovative armored combat vessel from the Civil War.

	Lost at Sea: The Search for Longitude How the quest for a reliable method to find your way at sea was solved by an 18th-century English clockmaker.

	Lost City of Arabia Helped by remote sensing, an expedition searches Oman's vast al-Khali desert for the lost city of Ubar.

	MARS Dead or Alive NASA gambles on two rovers sent to determine if the red planet ever had conditions suitable for life.

	NOVA scienceNOW: Maya NASA archeologists use satellites to pinpoint ancient ruins buried deep in the jungle.

	Nazi Prison Escape From 1940 to 1945, Allied prisoners of war engineered spectacular escapes from Colditz Castle, the Nazis' most impregnable prison.

	Odyssey of Life Lennart Nilsson's extraordinary microphotography reveals a world we've never seen—within and on ourselves.

	Perfect Pearl, The Once a rare gem produced by an accident of nature, the pearl is now the product of careful human engineering.

	NOVA scienceNOW: Profile: Cynthia Breazeal A daring engineer designs robots to communicate and interact the way people do.

	NOVA scienceNOW: Profile: Naomi Halas Naomi Halas is a pioneering nanotechnologist bent on seeing practical applications for her work—and soon.

	NOVA scienceNOW: Profile: Karl Iagnemma An innovative MIT roboticist is also an acclaimed fiction writer.

	NOVA scienceNOW: Profile: Yoky Matsuoka A former tennis prodigy aims to create advanced prosthetic limbs controlled by human thought.

	NOVA scienceNOW: Profile: James McLurkin James McLurkin of MIT is one of the world's leading designers of robot "swarms"—groups of robots that work together for a greater purpose.

	NOVA scienceNOW: Profile: Luis von Ahn A computer scientist finds novel ways to stop spammers and harness the brainpower of millions of people.

	Russia's Nuclear Warriors Go inside Russia's largest missile base, where soldiers still stand at the ready, awaiting orders to push the nuclear button.

	Saved by the Sun Is it time to take solar energy seriously?

	NOVA scienceNOW: Saving Hubble Two teams of spacewalkers take on the risky mission of reviving the ailing Space Telescope.

	Saving the National Treasures Restorers take on the preservation of the original Declaration of Independence, Constitution, and Bill of Rights.

	NOVA scienceNOW: The Search for ET Astronomers have their radio telescopes tuned to receive signals from alien worlds. But is anybody out there?

	Search for a Safe Cigarette The tobacco industry's quest for a "safer" cigarette is filled with promise and pitfalls.

	Secrets of Easter Island A team attempts to recreate the original islanders' success at moving and erecting giant moai statues.

	Secrets of Lost Empires II: China Bridge Two teams working from opposite sides of a turbulent river attempt to build a 12th-century Chinese bridge.

	Secrets of Lost Empires II: Easter Island How did the ancient Easter Islanders move and erect giant stone statues? Our team tests one theory.

	Secrets of Lost Empires II: Medieval Siege Two teams set out to build precise replicas of a fearsome medieval weapon—the trebuchet.

	Secrets of Lost Empires II: Pharaoh's Obelisk Experts take on the challenge of raising a 40-ton obelisk without using modern technology.

	Secrets of Lost Empires II: Roman Bath NOVA sets out to create a working Roman bath, complete with hot tubs and underfloor heating.

	Secrets of Making Money With a radically redesigned bill, the U.S. Treasury fights back against a new breed of counterfeiters.

	Secrets of the Samurai Sword Examine the thousand-year-old art and science behind the making of a Japanese warrior's key weapon.

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

	NOVA scienceNOW: Smart Bridges Can we engineer bridges that tell us what's wrong with them before it's too late?

	NOVA scienceNOW: Space Elevator Can we build a 22,000-mile-high cable to transport cargo and people into space?

	Special Effects: Titanic and Beyond NOVA goes behind the scenes in Hollywood, where the art of illusion meets the science of perception.

	Spies That Fly A new generation of pilotless planes fly, spy, and bomb in places too risky for human pilots.

	Sputnik Declassified Top-secret documents rewrite the history of the famous satellite and the early space race.

	The Spy Factory Examine the high-tech eavesdropping carried out by the National Security Agency and the pitfalls of surveillance in an age of terrorism.

	Stationed in the Stars NOVA examines the International Space Station, the largest construction project ever undertaken in orbit.

	Submarines, Secrets and Spies Explorer Robert Ballard, discoverer of the Titanic, investigates the wrecks of two Cold War-era nuclear submarines.

	Super Bridge Engineers solve a unique set of problems in safety, aesthetics, and cost as they build a bridge over the Mississippi River.

	Supersonic Dream Engineers, pilots, and others who knew Concorde tell its remarkable story.

	Supersonic Spies The race to build the world's first supersonic passenger airliner leads to a massive Cold War espionage effort.

	Terror in Space Russian and American astronauts experience life-threatening problems aboard the aging Mir space station.

	Titanic's Lost Sister Underwater explorer Robert Ballard uses sonar technology to find the Britannic, a ship lost in the Aegean in World War I.

	To The Moon Relive the remarkable history of humankind's journeys to the moon.

	Top Gun Over Moscow Flights in Russia's powerful fighter jets are for sale to foreign travelers. So is the Russian Air Force still in the game?

	Underwater Dream Machine Follow one man's quest to engineer a submarine with panoramic views.

	Volcano's Deadly Warning A man obsessed with understanding volcanoes comes up with a radical new way to predict eruptions.

	Wave That Shook the World Experts reconstruct the 2004 Indian Ocean tsunami in an effort to prepare for the next big one.

	Welcome to Mars Two rovers roaming the surface of Mars find proof that it was once awash in water.

	Who Killed the Red Baron? Forensic experts investigate the most famous aviation mystery of World War I.

	Why the Towers Fell Forensic engineers investigate the collapse of the World Trade Center.

	NOVA scienceNOW: Wisdom of the Crowds Ask enough people to estimate something, and the average of their guesses will get you surprisingly close to the right answer.

	Wright Brothers' Flying Machine Relive the engineering challenges that two obscure bicycle makers overcame to become first in flight.