Your spit has a painkiller 6 times stronger than morphine. It contains a substance called opiorphin that is stronger than morphine.
39
The aorta, the largest artery in the body, is almost the diameter of a garden hose.
37
You see your nose at all times, your brain just chooses to ignore it.
30
When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23
Your skeleton keeps growing until you are about 35, then you start to shrink.
74
Most lipstick contains fish scales.
37
After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139