Found this at the doctor's office; thought of Keith and Mike S.
Natalia
http://ngm.nationalgeographic.com/2012/01/twins/miller-text
(snip)
Lately, however, twin studies have helped lead scientists to a radical,
almost heretical new conclusion: that nature and nurture are not the
only elemental forces at work. According to a recent field called
epigenetics, there is a third factor also in play, one that in some
cases serves as a bridge between the environment and our genes, and in
others operates on its own to shape who we are.
*The Jim Twins*
The idea of using twins to measure the influence of heredity dates back
to 1875, when the English scientist Francis Galton first suggested the
approach (and coined the phrase "nature and nurture"). But twin studies
took a surprising twist in the 1980s, following the discovery of
numerous identical twins who'd been separated at birth.
The story began with the much publicized case of two brothers, both
named Jim. Born in Piqua, Ohio, in 1939, Jim Springer and Jim Lewis were
put up for adoption as babies and raised by different couples, who
happened to give them the same first name. When Jim Springer reconnected
with his brother at age 39 in 1979, they uncovered a string of other
similarities and coincidences. Both men were six feet tall and weighed
180 pounds. Growing up, they'd both had dogs named Toy and taken family
vacations in St. Pete Beach in Florida. As young men, they'd both
married women named Linda, and then divorced them. Their second wives
were both named Betty. They named their sons James Alan and James Allan.
They'd both served as part-time sheriffs, enjoyed home carpentry
projects, suffered severe headaches, smoked Salem cigarettes, and drank
Miller Lite beer. Although they wore their hair differently---Jim
Springer had bangs, while Jim Lewis combed his hair straight back---they
had the same crooked smile, their voices were indistinguishable, and
they both admitted to leaving love notes around the house for their wives.
(snip)
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