Doctors have treated only three leukemia patients, but the sensational results from a single shot could be one of the most significant advances in cancer research in decades, reports NBC's chief science correspondent Robert Bazell.

Hundreds may have been infected with hepatitis A after eating at an Olive Garden in Fayetteville, N.C.

Elderly women who have sleep apnea, a condition in which breathing is disrupted during sleep, are about twice as likely to develop dementia within the next five years as those without the condition, according to a new study.

Outdoor enthusiast Dr. Susan Weinkle has found a way to do what she once considered impossible: she can kayak Florida's waterways for five-hour stretches in midsummer and not get a speck of sunburn.

If you're trying to lose weight (and who isn't?), a new study finds that that more you chew up your food, the less you're likely to eat.

Listen up (lean in if you have to): Hearing loss is a big problem in the U.S., and not just for old folks anymore. Here are some signs that you, or a friend, might have a problem.

Psychologist and social scientist Dacher Keltner says his research shows the rich really are different: Their life experience makes them less empathetic, less altruistic, and generally more selfish.

What's your big secret? TODAY Moms and Parenting.com asked 26,000 moms: From sending sick kids to school to feeling overwhelmed to feeding them ice cream for breakfast, moms get real and confess all.

The sex of a fetus can be accurately predicted as early as five to  seven weeks, a new report finds. Scientists say genetic testing can be helpful in detecting fetuses at risk for sex-linked disorders. If they think that is the only result these findings will produce, they are dreaming, writes bioethicist Arthur Caplan.

Blood drawn from expectant mothers could offer parents an earlier sneak peek at their baby’s sex than methods currently used in the U.S., researchers said Tuesday.

When we witness a terrible accident, hear bad news or are in disbelief, putting our hands over our mouths is physically expressing that we can’t emotionally take anything else in.

State health officials hope to learn this week whether deer are the source of an E. coli outbreak in northwestern Oregon linked to fresh strawberries.

Scientists have solved the mystery of the missing fingerprints: Adermatoglyphia rare skin condition causes some people to be born without fingerprints, and it’s the subject of a new study published in the American Journal of Human Genetics.

A man can have problems performing in bed when his wife or girlfriend gets too friendly with his circle of pals, according to a new study that says men need female-free relationships of their own.

Raymond Johnson, who has breast cancer,  doesn't have insurance and made too much money to qualify for Medicaid. But he thought a federal assistance program for patients with breast and ovarian cancer would help him - until he learned only women qualified.