Can oxygen sometimes be toxic? Find out on today's Moment of Science.
Through the early 1600s, physicians believed there were two kinds of blood, one made by the liver and one by the heart...
If you get bad leg cramps, it could be a sign of serious heart disease.
What keeps penguin's feet from freezing? Penguins' feet don't freeze because of the blood circulating in them.
Scientists are experimenting with rat whiskers. The have found that they stop a stroke from occurring. Cool, right? But, would it work on humans?
According to one study, some kinds of cocoa could not only taste good, but be good for you, too. Learn more on this Moment of Science.
If you've ever had your blood pressure checked. But did you ever wonder why it's your upper arm that gets the big squeeze, rather than your wrist or your leg?
Are you familiar with shape memory alloy? There's no actual memory involved, at least not in computer or human terms.
Swollen Hands and Walking, on today’s Moment of Science. Do your hands swell up when you walk? If they do, it probably has to do with your circulation. The circulatory system is a one way street. Blood flows away from the heart in the arteries, down the arms and legs then back up to the [...]