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Underwater Power Play
Human-powered submarines go head-to-head in the Florida surf to see who has the fastest design.


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Tackling a Killer Disease
A young boy battles a crippling disease. Thanks to a new procedure, muscle tissue transplanted from his twin brother may help him fight back.


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The Art of Science - Panspermia
Karl Sims has created a fascinating animated journey based on one theory of the origin of life on Earth.


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Turtle Homecoming
Researchers confirm that female sea turtles return to the beaches where they were born some 40 years later to lay their eggs. But how?


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Common Sense Computer
Scientists try to give a super-computer enough knowledge to be able to draw comparisons and come up with common sense answers.


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