When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23
We share 70% of our DNA with a slug.
218
A human being loses an average of 40 to 100 strands of hair a day.
133
The human brain doesn't stop developing until about 25 years old.
102
The human brain is more active during sleep than during the day.
28
Human hair and fingernails continue to grow after death.
7
Enamel is hardest substance in the human body.
61
It takes about 20 seconds for a red blood cell to circle the whole body.
102