There are actually seven different types of twins: Identical, Fraternal, Mirror-Image, Polar Body (Half Identical), Mixed Chromosome, Superfecundation, and Superfetation.
20
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
Most of us have microscopic, worm like mites named Demodex that live in our eyelashes and have claws and a mouth.
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Infants spend more time dreaming than adults do.
102
A man is more likely to get a woman's phone number if he is accompanied by a dog.
20
Yawns are more contagious among people with closer relationships.
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