Explore Teacher's Guides

Mass Extinction
Running time: 13:15
What caused the mother of all extinctions 250 million years ago?
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Maya
Running time: 13:38
NASA archeologists use satellites to pinpoint ancient ruins buried deep in the jungle.
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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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Mirror Neurons
Running time: 13:50
Discover the role mirror neurons may play in human actions and interactions and find out how scientists think mirror neurons work.
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Obesity
Running time: 12:01
Examine the biology behind the compulsion to eat.
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Pandemic Flu
Running time: 6:23
Will the virus that causes bird flu develop the ability to move from person to person?
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Papyrus
Running time: 9:01
Scraps of writings from a garbage dump in ancient Egypt reveal what life was like 2,000 years ago.
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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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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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Profile: Naomi Halas
Running time: 09:45
Naomi Halas is a pioneering nanotechnologist bent on seeing practical applications for her work—and soon.
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Profile: Erich Jarvis
Running time: 12:22
The work of neuroscientist Erich Jarvis demonstrates the power of open-mindedness in the lab.
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Profile: James McLurkin
Running time: 09:45
Meet MIT graduate student James McLurkin, a robotics engineer who plans his busy life so that he can "do it all."
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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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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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RNAi
Running time: 15:37
A wayward petunia leads to the discovery of modest little molecules with enormous medical promise.
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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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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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Sleep
Running time: 12:48
Why do we need sleep? Part of the answer may be to strengthen memories.
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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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Space Elevator
Running time: 11:44
Can we build a 22,000-mile-high cable to transport cargo and people into space?
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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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Stem Cells
Running time: 14:40
What are they, and how do we find a balance between hope for cures and respect for life?
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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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Stronger Hurricanes
Running time: 6:12
Is global warming making hurricanes more intense?
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10th Planet
Running time: 5:27
A stunning discovery at the far reaches of our solar system raises questions about what makes a planet a planet.
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T. Rex
Running time: 08:03
An astonishing adolescent growth spurt accounts for T. rex's enormous size.
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T. Rex Blood?
Running time: 12:58
Preserved soft tissue, including possible blood vessels and red blood cells, are turning up in dinosaur fossils.
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