A man's beard grows fastest when he anticipates sex.
239
A human being loses an average of 40 to 100 strands of hair a day.
133
The human brain is more active during sleep than during the day.
28
The human brain has the capacity to store everything that you experience.
4k
Yawns are more contagious among people with closer relationships.
163
When you kiss someone for the first time, you get a spike in the neurotransmitter dopamine, making you crave more.
23
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118