19-19 Segment 1: Cancer Suppression: Lessons from Pachyderms

DNA mutations happen all the time in the body, but the immune system usually detects and deals with them. When the system fails, cancer results. Yet some animals, such as elephants, almost never get cancer, and scientists have learned that the elephant DNA repair system is 20 times more powerful than the human system. Experts explain how they hope to tap this knowledge.

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19-13 Segment 1: “Difficult” Patients: Questioning Authority

Patients used to accept doctors’ orders without question. Today, more are asking questions and challenging their doctors’ opinions. However, even those who do it politely are likely to be labeled “difficult.” A doctor whose late wife nearly made a career of being a difficult patient discusses how patients can do it respectfully and fruitfully.

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