Your tongue is the only muscle in your body that is attached at only one end.
173
Ingrown toenails are hereditary.
15
Brain freeze is caused by the brain sensing the drop of temperature on your palate and increasing blood pressure in an attempt to save you from freezing.
14
Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13
One out of 20 people have an extra rib.
66
On average, there's 100 billion neurons in the human brain.
83
Our brains have a negativity bias and will remember bad memories more than good ones.
15
