Ants closely resemble human manners: when they wake, they stretch and appear to yawn in a human manner before taking up the tasks of the day.

If you go blind in one eye, you only lose about one-fifth of your vision but all your sense of depth.

It has been estimated that humans use only ten percent of their brains.

Right-handed people live, on average—nine years longer than left-handed people.

Your fingernails grow faster when you are cold.

Human bone is ridiculously strong. A cubic inch of it can bear the weight of five standard pickup trucks, making it four times as strong as concrete. 

Watching your favorite movie over and over is good for you. The repetition calms you because knowing the outcome of a story helps you to feel safe in an unpredictable world.