Adult painted turtles head underwater, where they'll spend the winter on the bottom of a lake, pond, or river but they use some tricks to survive the cold...
What is frostbite and why is it so dangerous to your body?
How does hair development start, what is a hair follicle, and why does hair turn gray?
Ever wonder why it takes so long for a scratch on the elbow to heal? After all, it takes just minutes for a scratch on the eyeball to heal.
We've all probably taken a bath, or been in the pool, then noticed parts of the palms of our hands and our feet become wrinkled. Why does this happen?
Have you ever gotten a callus and wondered what is was?
If our body temperature is in the nineties why do similar air temperatures feel too hot instead of just right? Learn more on this Moment of Science.
If blood is either red or blueish, depending on the presence of oxygen, why are bruises sometimes black, green, brown, or even yellow?
Readers of detective fiction knows one thing fingerprints are good for, their unique patterns. Why have we evolved such convoluted fingertips and why so useful?