Enamel is hardest substance in the human body.
61
When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
1k
Obsessive nose picking is called Rhinotillexomania.
101
After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139
A person will create enough saliva to fill two average size swimming pools during his lifetime.
191
Your fingernails grow faster in summer.
744
The human brain doesn't stop developing until about 25 years old.
102
The average person's skin weighs twice as much as their brain.
131