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Does Fido love you because you feed him, or because you share a special bond? New findings hold clues.

People who think they can get by on very little sleep may be more tired than they realize, a new study finds.

Sleep problems and gloomy daydreams may worsen the symptoms of an unusual psychiatric disorder.

Pot smokers may be thinner than people who don't use the drug, a new study suggests.

Children are recommended to get the flu vaccine by injection, and not by nasal spray, this year.

Researchers wanted to know what's going on in a dog's brain when its owner is talking. So, they scanned dogs' brains.

When you find a topic really interesting, you might be more likely to have false memories related to tha topic, a new study finds.

A study of pediatricians suggests that more parents are refusing to vaccinate their children, compared with a decade ago. But their reasons are different now.

Two months of the year see higher divorce rates than the rest.

Humans' supposed "optimism bias" might not actually be a thing.

Taking calcium supplements may raise the risk of developing dementia in women who have previously had a stroke, or have early signs of other cerebrovascular disease.

The Mediterranean lifestyle -- which includes not only eating well, but also exercising and socializing -- may be beneficial for people's risk of depression, a new study finds.

The popularity of trampoline parks is on the rise, and with it the number of emergency-room visits for injuries that kids get while at these parks, according to a new study.

Inhaling secondhand marijuana smoke even for just 1 minute may temporarily affect how blood vessels function, according to a new study done in rats.

A specially-designed energy drink that contains ketones may help people exercise at a higher level, a new study finds.

In a new study, researchers looked at what kind of feedback was the most motivating to get people to exercise.

In a new report, researchers look at the numbers of people that police killed or injured during one year, broken down by race and ethnicity.

The number of young kids in Colorado who accidentally consume marijuana has increased since buying the drug for recreational use became legal there in 2014, according to a new study.

A detailed new map of the human brain's outer layer identifies nearly 100 brain areas that have not been previously reported, according to a new study.

Pediatricians should help educate their patients about sex and help parents learn how best to talk to their kids about sexuality, a new report says.

The huge array of toxins produced by venomous fish are a largely untapped potential for medicines, researchers say.

Taking prenatal vitamins may be a waste of money, a new review suggests.

For kids, sucking their thumbs or biting their nails may mean a lower risk of developing allergies later in childhood, according to a new study that spanned three decades.