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Internal Defenses
 This program deals with events when the entire body is under attack-when bacteria or viruses invade the whole system. It shows the roles of the spleen, the lymphatic system, and the white blood cells, and explains the body's production of antibodies....(more details) |
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$99.95 |
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$149.93 |
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$99.95 |
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Viruses
 Viruses are the simplest forms of life-so primitive in biological terms that for some years the scientific community debated whether they should even be regarded as living organisms. This program examines how viruses, though incapable of reproducing ...(more details) |
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$169.95 |
| DVD + 3-Year Streaming |
$254.93 |
| 3-Year Streaming |
$169.95 |
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Hot and Cold
 Using the extremes of temperature that occur in a day's skiing, this program shows the range of mechanisms through which the human body maintains a steady internal temperature and protects its vital organs: shivering, hair erection, and rerouting of ...(more details) |
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$99.95 |
| DVD + 3-Year Streaming |
$149.93 |
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$99.95 |
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The Politics of Trees
 This program with Bill Moyers looks at the ongoing debate on how we manage the rapidly disappearing old-growth forests of the Pacific Northwest. Is the timber industry pressuring the forest service to cut trees in violation of environmental laws? Are...(more details) |
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$99.95 |
| DVD + 3-Year Streaming |
$134.92 |
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$99.95 |
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Politics, People, and Pollution
This program with Bill Moyers explores the delicate balance between corporate productivity and environmental responsibility, looking at the growing number of corporate "green" ads and asking: what is image? what is reality? Featured in the program ar...(more details) |
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