Your thumb is about the same size as your nose.
124
The human eye blinks an average of 4,200,000 times a year.
233
You can't tickle yourself.
29
When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23
The largest cell in the human body is the female egg and the smallest is the male sperm.
682
Human hair and fingernails continue to grow after death.
7
Your fingernails grow faster in summer.
744
Enamel is hardest substance in the human body.
61