WHY SOME OF US ARE LEFTIES-
most cases of left-handedness are thought by many scientists to be due to compromised oxygen supply before birth. but the evidence relies heavily on statistics. twins, for example, have a high proportion of neurological problems due to crowding in the womb and are twice as likely to be lefties as singletons. the mentally ret*d, epileptics, and children with learning disorders are disproportionately left-handed. the largest population of lefties is found among autistics, of which 65% are lefties. in 2007, a gene thought to be contributory to left-handedness was found, it is called LRRTM1 and is also associated with a slight increase in mental illnesses such as schizophrenia later in life. it is passed through fathers to their sons and tends to manifest comorbids most often after the age of 40.
SOME PERILS OF BEING A LEFTIE-
migraines, allergies, dyslexia, stuttering, some mental illnesses, skeletal malformations, accident-proneness and thyroid disorders are all suffered more by lefties. according to a university of washington study done some decades back, some lefties [about one in ten] have an irregularity with their corpus collusum [that thingie that links the left and right brain hemispheres and allows coordination of bilateral neural functioning] which has been found to cause increased proneness to physical clumsiness/accident-proneness. the outward physical trait which is a external marker for this, is the tendency of affected lefties to write with the top of their pen or pencil pointed outward away from their torso rather than inward toward their left shoulder. this same study said those unlucky lefties lived on average, 9 fewer years than the more fortunate lefties and righties.
SOME ADVANTAGES OF BEING A LEFTIE-
but lefties recover better from strokes than righties because 40% of them use BOTH SIDES of their brains to process speech, instead of only the left side as righties do. some of the world's greatest geniuses, including leonardo da vinci, michelangelo, and ben franklin were southpaws. the incidence of left-handedness is higher than average among the world's artists and scientists. although one out of ten people on earth is a leftie, the incidence of lefties in NASA's apollo space program was found to be one in four. at least 7 U.S. presidents were lefties, including the most recent POTUS. bill gates is a leftie.
LEFTIES ARE NOT [generally] SINISTER! maybe sneaky now and then, but mostly harmless 