Intelligent people have more zinc and copper in their hair.
233
Most people smile when they are frustrated, according to a study.
15
Two in five people in the world marry their first love.
270
If you're one in a million, there are about 7,234 people just like you.
31
People who sleep late have more mental stamina and can outperform early risers.
33
2% of Europeans lack the genes for smelly armpits.
6