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.

Taking Body Basics Seriously

Many people have questions about their bodies that seem so silly, they never bring them up with their doctors. While the answers are sometimes humorous, often they are more complicated and important than we imagine. An expert physician/writer discusses.

17-43 Segment 1: The Biology of Addiction

Scientists are learning the specific workings of the brain when it is addicted to a substance or behavior, and showing that all addictions are similar.