Roughly a quarter of the world's people live in China.
50
The offspring of two sets of identical twins are legally cousins but genetically siblings.
63
Two in five people in the world marry their first love.
270
The average person walks the equivalent of twice around the world in a lifetime
69
Babies that are breastfed are more likely to be slimmer as adults than those that are not breastfed.
110
One in 500 humans has one blue eye and one brown eye.
145