Yawns are more contagious among people with closer relationships.
163
One in 500 humans has one blue eye and one brown eye.
145
Chen Guanming, from Jiangsu province in eastern China, traveled by RICKSHAW for 2 years and covered nearly 40,000 miles through 16 countries, surviving flood, war zones and extreme temperatures, finally arriving at the London 2012 Olympics.
7
Only 2% of the Earth's population are natural redheads.
13
The world's shortest man measures only 21.5 inches.
73