Women have twice as many nerve receptors as men, causing them to feel pain more intensely. However, they also have a higher tolerance for it.

There’s a biological reason why we can’t resist puppy dog eyes. Sustained eye contact significantly raises oxytocin levels in both humans and dogs, which in turn encourages trust, love, and bonding. This response is found in hand-raised wolves, which suggests that humans and dogs may have co-evolved to share this trait in order to be companions.

There are more neurons lining your stomach than there are in your spinal cord, so your digestive system can work without needing your brain. In fact, when you are flooded with emotion the neurons react and you get a “gut feeling.”

A study done in 2011 shows that the brain responds to emotional pain the same way that it does to physical pain. So, when people say rejection hurts, it’s quite true.

Your eyebrows renew themselves every sixty-four days.

Emotions and stress can adversely affect your body. Negativity can actually lower your immune system’s response to disease.

Like fingerprints, everybody’s tongue print is different.

Neurologists claim that every time you resist acting on your anger, you’re actually rewiring your brain to be a calmer and more loving person.

The average person yawns about 250,000 times over the course of their life. Babies in the womb even yawn as early as twelve to fourteen weeks.