6. Photic Sneeze Reflex
This unusual condition involves uncontrollable sneezing in response to bright lights. It is not well understood why it occurs, but around 18-35% of the population suffers from it. How about you? Does the sun make you sneeze?
5. Short Sleepers
A small percentage of the population possesses a gene that allows them to need far less sleep than the average person. More time for late night video games, eh? The effected gene is known as BHLHE41 and former UK Prime Minister Margaret Thatcher was one such person who had it.
4. Blue Eyes
Only around 8% of the world’s population possesses baby blues. This genetic mutation is a lot more recent than you might think. It is estimated that the first humans with blue eyes emerged between 6,000 and 10,000 years ago.