Moms of twins live longer: In a study of naturally conceived twins that spanned from 1800 to 1970, records indicated that mothers of twins tended to live longer than mothers of singlets.
Almost half of all twins create their own language: To communicate with one another, around 40 percent of twins create an autonomous language that only they understand.
Massachusetts has the highest twin birthrate in the country:4.5 out of every 100 live births in Massachusetts are twins, compared to New Mexico, which has the lowest twin birthrate in the nation.
Women who eat dairy are more likely to conceive twins: In a study that compared vegan and nonvegan women's pregnancies, researchers concluded that women who eat dairy are about five times more likely to have twins than vegan women.
Belly buttons and fingertips are the best way to tell twins apart: Because belly-button shapes aren't genetic (simply cut by a doctor) and fingerprints are determined by a baby's placement in the womb, each are good indicators of a twin's identity.