The Circulatory System

Three people in Uganda and Kenya have died from an extremely rare and deadly disease caused by the Marburg virus, the World Health Organization reported today (Nov. 7). What is the Marburg virus?

A certain molecule in mammal blood provokes extreme reactions in different species, driving bloodlust in wolves and triggering aversion in humans.

The U.S. Food and Drug Administration (FDA) has a message for candy-lovers: "As it turns out, you really can overdose on candy — or, more precisely, black licorice."

A sneaky takeoff technique helps mosquitoes escape undetected after they bite you.

A New York man is crediting an Apple Watch app with saving his life, after the app helped him detect signs of a life-threatening blood clot.

There's nothing quite like the rush of seeing your favorite sports team pull off a win at the last second.

What happens in the brain and body in the moments after cardiac arrest?

Skipping breakfast on a regular basis may be harmful to your heart, a new study from Spain suggests.

Meditation may help ward off heart disease, experts say.

Your height may be linked to your risk of blood clots: A new study from Sweden finds that taller men and women were more likely to develop blood clots in their veins than their shorter counterparts.

Humans first journeyed into space in 1961, but even half a century later, questions remain about how spaceflight affects the human body.

What if you could reap the benefits of exercise without moving a muscle?

The patterns in your brain may predict how your body physically reacts to stressful situations, a new study finds.

A 25-year-old woman in Australia died after consuming too much protein, in the form of shakes, supplements and protein-packed foods, the New York Post reported yesterday.

Smoking pot is often considered safer than smoking cigarettes, but a new study suggests that marijuana use may increase a person's risk of death from high blood pressure.

Eating a plant-based diet is good for your health — but some plant-based diets are better than others, a new study that spanned nearly three decades finds.

A judge in Ohio recently ruled that the data from the pacemaker of a man accused of arson could be used at his trial, according to news reports.

Can you name the No. 1 killer of women in the U.S.? Nearly half of women can't, a new study finds — and that's a problem.

A Massachusetts mom recently spoke to People magazine about the rare genetic disease that she shares with the three daughters who she adopted from China.