A study found that playing with dogs increased levels of joy-inducing hormones.

Alpha brain waves dominate when people feel calm and in control. HAPPY BRAIN WAVES

Reflex responses, like a knee jerk, come from the spinal cord, not the brain

The brain is wired to see patterns in all objects.

You cannot tickle yourself, because your brain anticipates the touch 

Reading and writing use different neural networks.

The neurons you have at birth are all you will ever have.