PBS - Scientific American Frontiers | FRONTIERS Show 202 | Watch Online

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				Endangered Wonder Drug The cancer-fighting drug Taxol comes from the increasingly rare Pacific yew tree. Scientists are trying to find alternate sources in nature and the lab.

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				Designer Wheels Athletes custom design sleeker, faster wheelchairs to compete in the Boston Marathon.

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				Restoring the Prairie Conservationists work to bring back the original prairie using tools like fire to encourage the growth of hearty prairie grasses.

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				Sci-fly Students compete in the very first aerial robotics contest.

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				Invasion of the Pupae Snatchers Aggressive parasitic ants conduct raids on more peaceful ant species, culminating in a fight to the death between rival queens.

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