The offspring of two sets of identical twins are legally cousins but genetically siblings.
63
Awarding people money for doing well in IQ tests causes them to score better, $10 increased people's score by an average of more than 20 IQ points. IQ tests don’t just measure intelligence - they also measure effort.
9
Men fall in love faster than women do.
32
The average person in their lifetime will spend an estimated 20,160 minutes kissing!
212
One million Americans, about 3,000 each day, take up smoking each year. Most of them are children.
-86
A chance of a woman having twins is increased after the age of 35. About 1 in 27 women will give birth to twins after this age. After 50 the chances of having twins is 1 in 9.
51
Babies cry but they don't produce tears until one to three months after birth.
238
