One common misconception people have regarding evolution is that the gradual changing of physical forms always benefits the species in question.
Did you ever hear that blood is actually blue inside your body, but turns red instantly on contact with air? Learn more on this Moment of Science.
Humans may be evolving toward having less than thirty-two teeth.
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?