What keeps penguin's feet from freezing? Penguins' feet don't freeze because of the blood circulating in them.
Why does stepping in a puddle of water make your feet cold for the rest of the day?
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?
What creature has more than one heart? Find out on this Moment of Science.
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 [...]