Science May 10

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Chimpanzee Testing: Is it the Beginning of the End?

Medical experiments on chimpanzees can be invasive, involving injections, blood samples and liver biopsies. But some say it's the only way to advance medicine. Miles O'Brien's report explores whether there are ever instances in which the scientific value of research…

Health May 20

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Kennedy May Face Lengthy Treatment for Brain Tumor

Sen. Edward Kennedy was diagnosed with a malignant brain tumor, his doctors said Tuesday. Malignant gliomas, like Kennedy's, are the most common type of adult brain cancers, inflicting some 9,000 Americans a year. A medical expert discusses treatment for brain…

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