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Seasons 11-15 | Seasons 1-10

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Season 15 (2005)

Premiered January 19, 2005 In spite of the risks, people are lining up to solve their weight problems in the operating room. And if the latest device -- an implantable stomach "pacer" -- works out, millions more will be taking the surgical way out.		Premiered January 26, 2005 The fully automatic car may be down the road a ways, but cars that do your thinking for you are just around the corner -- they watch out for hazards, they listen to you, they read your lips, they even know when you're distracted.

Premiered February 2, 2005 A look back at the decades of effort that culminated in the deep sub Alvin reaching the ocean floor, and a look forward to what's next now Alvin's retiring.		Premiered February 9, 2005 A visit with an engaging if unruly bunch of cousins that we formally broke up with about 6 or 7 million years ago - with whom we share almost all of our genes but not a lot of our lifestyle. Why the difference? Maybe it's in how we learn.

Premiered February 16, 2005 So you think global warming won't affect you? Wait until the great Atlantic Conveyor shuts down. And find out what's already happening in Alaska.		Premiered February 23, 2005 Hydrogen may be the fuel of the future, but what will it take to safely and efficiently make the transition from today’s fossil fuels?

Premiered March 2, 2005 If you think you know why you do things, you're probably wrong. How does the unconscious mind determine human behavior?		Premiered March 30, 2005 The best kept secret of American archaeology is now revealed – an entire canyon of perfectly preserved 1,000-year-old remains.

Premiered March 6, 2005 Replacement synthetic senses for people are now a reality. Children as young as 12 months are already getting artificial hearing - while the first trials of electronic retinas for the blind are just beginning.		Premiered April 13, 2005 To be really useful, robots need to behave as cooperative partners rather than mindless machines. We'll meet three robots - including a future member of an astronaut team - that are trying to better understand us.

Season 14 (2003-2004)

Premiered January 30, 2004 Scientists try to figure out the body's complex weight-regulation system, while Alan and 10 volunteers try to shed unwanted pounds.		Premiered May 11, 2004 Scientists attempt to unravel the mysteries of memory -- how we make them, where they come from and why some slip away.

Premiered May19 , 2004 Alan visits the research labs and testing tracks of the Big 3 automobile makers to find technologies that will fuel the cars of the future.		Premiered June 15, 2004 Melting glaciers, dying forests, and disappearing lakes; Scientists explain why warmer temperatures are cause for alarm.

Premiered June 22, 2004 New discoveries about Dark Matter and Dark Energy have astronomers wondering if ours is but an infinity of universes.		Premiered July 30, 2004 Who were the first Americans? New discoveries and techniques for dating have archeologist rethinking what they know-- and rewriting history.

Season 13 (2002-2003)

Premiered October 8, 2002 Archaeologists shed new light on life in colonial America.		Premiered October 15, 2002 Scientists look to the brain's frontal lobe as the seat of personality.

Premiered October 22, 2002 Scientists blend technology with sociology to make our machines more fun to use.		Premiered November 5, 2002 Scientists scramble to understand the intricate natural systems on which all life depends—before it's too late.

Premiered November 26, 2002 Scientists unlock secrets from the last frontier on Earth - the ocean depths.		Premiered January 28, 2003 Investigating the past, present and uncertain future of the ocean's long-distance travelers -- salmon and tuna.

Premiered February 18, 2003 Scientists attempt to untangle and harness the mysterious power of the placebo affect.		Premiered April 1, 2003 Researchers listen in on animal communication as birds, bees, bugs, bats and elephants flirt, eavesdrop and even give directions.

Premiered April 8, 2003 From scientists to musicians, people are using technology in creative new ways: converting the digital to the tangible.		Premiered April 8, 2003 The "fight or flight" response to stress once helped us evade predators, but its long term effects can get us into an different kind of trouble - ill health.

Season 12 (2001-2002)

Premiered October 16, 2001 Where the worlds of hi-tech and the family pet converge. Alan trains a virtual dog and discovers Internet links for lonely parrots.		Premiered October 23, 2001 Alan meets some of the brightest and most charismatic scientists hunting genes.

Premiered October 30, 2001 Meet the scientists who combine high-tech tools and old-fashioned sleuthing to bring the past alive.		Premiered November 6, 2001 Globalization means increasing threats from alien species of plants, animals, insects and diseases.

Premiered November 13, 2001 Alan meets some children who face challenges far beyond the usual stresses and strains of growing up.		Premiered March 19, 2002 Alan Today's technology can give athletes the edge, aid officials and enhance the spectator's experience of the game.

Premiered May 14, 2002 New technologies and pioneering scientists have opened up the farthest reaches of the ocean.		Premiered May 21, 2002 Skilled science students put their ingenious creations to the test while competing for the top prize.

Premiered May 28, 2002 In the booming new field of bioengineering, remarkable advances are being made in the making and replacing of human body parts.		Premiered June 4, 2002 "Alternative" medicines are a growing, multi-billion dollar industry. But do they hold up under scientific scrutiny?
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Season 11 (2000-2001)

Premiered November 21, 2000 Some of the nations top neuroscientists uncover new evidence of our brain's ability to change.		Premiered November 28, 2000 Discover the science behind people who push themselves to the limits of human performance.

Premiered December 19, 2000 How did life arise on Earth? What separates humans from apes? Will machines one day invent themselves? Learn more here.		Premiered January 23, 2001 Learn about advances in the repair and replacement of the hard-working heart.

Premiered January 30, 2001 Why can't you tickle yourself? Is laughter uniquely human? These little questions might have some big answers.		Premiered February 6, 2001 Alan Alda learns that sometimes saving endangered species requires restoring whole ecosystems.

Premiered March 27, 2001 Researchers are uniting biology and technology to give hope to the paralyzed.		Premiered April 3, 2001 Get to know chimpanzees, how they socialize with each other, new dangers they face, and just how similar our species truly are.

Premiered April 10, 2001 Join aviation engineer Paul MacCready and Alan Alda as they test fly a variety of unconventional planes.		Premiered May 1, 2001 Alan Alda explores the real science behind fad foods, eating habits and lifestyles.
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