There are actually seven different types of twins: Identical, Fraternal, Mirror-Image, Polar Body (Half Identical), Mixed Chromosome, Superfecundation, and Superfetation.
20
90% of people sit at their computer desk slouching, supporting their head with their left hand.
41
Half of all Americans over the age of 55 have no teeth.
39
Forty percent of Americans have never visited a dentist.
33
On average women can hear better than men.
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The average bra size today is 36C. Ten years ago it was 34B.
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