If you stop working out, it takes twice as long to lose strength than it took to gain it.
16
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
The average person has over 1,460 dreams a year!
69
The brain receives 20% of the body’s oxygen and 25% of total body glucose utilization, despite it accounting for only 2% of a person’s weight (about 1.4 kilograms).
8
The tongue is the strongest muscle in the human body.
50
Dating back to the 1600's, thermometers were filled with Brandy instead of mercury.
16
A fetus develops fingerprints at eighteen weeks!
32
We blink 25 times a minute.
51