Yawns are more contagious among people with closer relationships.
163
If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
15
Women mature much faster than men.
1k
Intelligent people have more zinc and copper in their hair.
233
People who have a strong friendship possess the ability to communicate with one another through facial expressions.
46
Only 2% of the worlds population is blonde.
15