Science Video

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Two million varieties of crops?

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Protected from nature and man

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The problems with a dwindling diversity

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The coldest spot possible

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Life's hope in a frozen wasteland

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U.S. wildlife authorities have reintroduced a rare sub-species of gray wolf in Arizona and New Mexico, but cattle interests, political pressures and poachers have all but doomed the recovery program.

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China's appetite for turtles threatens the survival of many species, even in the United States.

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A history of flying cars

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Bob Simon takes a turn on the AirScooter

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Avoiding gridlock in the air

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A whole new way of getting to work

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"It's going to change transportation"

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21st century jetpack

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"Pretty cool"

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It's a cross between a Ferrari and the Batmobile

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A new Federal plan for managing Alaska's vast Tongass National Forest sparks new debate on logging.

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In Florida, power plants discharge warm water and provide manatees with essential habitats.

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With a strategy to fight a disease threatening cattle, critics say, authorities in Wyoming are unnecessarily capturing, testing and killing wild elk.

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Taking his passengers to an altitude that reveals the extent of its impact on the land, one pilot hopes to make people understand how oil and gas drilling is transforming America's western landscapes.

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Can gastric bypass eliminate type 2 diabetes?

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Dealing with defeat

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His own personal climate crisis

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Spreading his message across the globe

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The rather odd way he found out

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His thoughts on the president's environmental record

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His eco-friendly home

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Will he run again?

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Using Madison Avenue to save the world

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Has Gore made up his mind?

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The surprise hit

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In capturing carbon from the atmosphere, old-growth forests are gaining market value beyond the price of their timber.

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John Kanzius doesn't mind if someone steals his idea

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Lesley Stahl's studio intro

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The ultimate "weed killer"

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Cancer surgeon Dr. Steven Curley demonstrates how nano-particles target cancer

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The Kanzius machine has shown promise in animal testing

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The simplest ideas are sometimes the best!

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Cancer researchers have high hopes

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A high-tech machine with a low-tech target

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See the radio waves in action