Some people have a "natural alarm clock" allowing them to wake up when they want. This is actually caused by a burst of the stress hormone adrenocorticotropin.
15
The average person has over 1,460 dreams a year!
69
Quick naps not only improve your alertness, but they also help in decision making, creativity and sensory perception.
149
Your ribs move about 5 million times a year, every time you breathe!
60
All humans have the ability to see ultraviolet light, but it is passively filtered out by the eye's lens. People who undergo surgery to remove the lens can detect ultraviolet light.
21
When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23
The lifespan of a tastebud is ten days.
130
After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139