Have you ever dipped your toe into a hot bath and felt a flash of icy cold just before you realize that its really burning?
Do you ever get choked up during a sad movie? Does it feel like a lump in your throat?
Why does a paper cut hurt so much more than a cut with a razor blade?
It's impossible for hair to completely change color overnight. Learn more on this Moment of Science.
If you get bad leg cramps, it could be a sign of serious heart disease.
What keeps seemingly defenseless grass from hungry grazers?
How much more does an older runner have to run in order burn as many calories as a teenager?
The soup could use a little more salt, but a voice in your head wonders if salt is bad for your health.
There's one da Vinci of the body, a true Renaissance organ, which can perform functions of the lungs, liver, stomach and kidneys.
Do you know exactly where your heart is located? How about your bladder?