Testing for breast cancer genes BRCA-1 and 2 has been inaccessible to many women due to extremely high cost. Now a new 249 dollar breast cancer gene test is available. Experts discuss whether this changes who should be tested.

The sense of smell evokes powerful memories and makes food taste good, but it also has important functions in interpersonal relations and personal safety. Experts discuss the science behind it.

Seven hundred children under age 15 drown in the US each year, most within sight of a parent or other adult. One major reason is because drowning doesn't look like most people picture it, and so are unaware the child is in trouble.

Many diseases have a genetic trigger, but a noted researcher concludes that alteration of the diet can override that programming. He discusses how disease doesn't have to be preordained.

The cultural bias against obesity is often justified on health grounds. But recent studies show that people classified in the "overweight" BMI category actually have less mortality than normal weight people.

Jeff Passan of Yahoo Sports explains the science of pitching injuries.

Lung cancer is the world's #1 cancer killer, but its association with smoking has created a stigma that often stuns patients who never smoked and results in much less research money for lung cancer than for other less lethal diseases.

Doctors too often use language that's indecipherable to normal people. Efforts are underway at medical schools to teach doctors to speak in plain language. An expert at one such school and a participant in these classes discuss.

Surveys show young women are often unaware of their risk of a heart attack and are much less likely to go to the ER when a heart attack occurs. Experts discuss reasons and possible remedies.

Since the dawn of medicine, doctors have believed that, once injured, the brain could not heal. Now they've learned that the brain can heal, and are beginning to tap ways to make it heal better and faster.