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The Search for ET
Running time: 11:26
Astronomers have their radio telescopes tuned to receive signals from alien worlds. But is anybody out there?
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Stem Cells Breakthrough
Running time: 13:45
Three separate teams overcome a biomedical hurdle—creating stem cells without the use of human embryos.
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Profile: Edith Widder
Running time: 9:14
Meet a marine biologist and explorer who has engineered new ways to spy on deep-sea creatures.
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Bird Brains
Running time: 12:47
Clues to the origins of human language are turning up in the brains of birds.
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Space Storms
Running time: 9:52
Behind the dazzling display of the aurora borealis are space storms that could turn the lights off here on Earth.
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Smart Bridges
Running time: 9:54
Can we engineer bridges that tell us what's wrong with them before it's too late?
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Saving Hubble
Running time: 13:01
Two teams of spacewalkers take on the risky mission of reviving the ailing Space Telescope.
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First Primates
Running time: 13:04
Our most distant primate ancestors, which took the stage shortly after the dinosaurs left it, were tree-dwellers the size of mice.
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Killer Microbe
Running time: 8:29
A relatively benign bug becomes a highly lethal pathogen, known to U.S. soldiers as Iraqibacter.
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Personal DNA Testing
Running time: 12:00
Genetic testing to assess risk factors for a handful of serious illnesses is now commercially available. But is it a good idea?
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Capturing Carbon
Running time: 12:06
An 8th-grader's science project prompts her scientist father to develop a new way to pull excess CO₂ out of the atmosphere.
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Profile: Pardis Sabeti
Running time: 8:00
By night she's a rocker. By day, she's a Harvard geneticist tracking the evolution of the human genome.
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Dark Matter
Running time: 13:50
Turns out most of the universe is held together by a mysterious, invisible substance.
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Of Mice and Memory
Running time: 12:16
Mice placed in enriched environments can recover lost memories, giving hope to those who study Alzheimer's.
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Profile: Hany Farid
Running time: 13:13
This self-proclaimed "accidental scientist" is a digital detective inventing new ways to tell if photos have been faked.
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