Karle was born in
New York City, on June 18, 1918, the son of Sadie Helen (Kun) and Louis Karfunkle. He was born into a
Jewish family with a strong interest in the arts. He had played piano as a youth and had participated in a number of competitions, but he was far more interested in science. He attended
Abraham Lincoln High School in
Brooklyn, and would later join
Arthur Kornberg (awarded the Nobel in Medicine in 1959) and
Paul Berg (a winner in Chemistry in 1980), as graduates of the school to win Nobel Prizes. As a youth, Karle enjoyed
handball,
ice skating,
touch football and swimming in the nearby
Atlantic Ocean. As part of a plan to accumulate enough money to pay for further graduate studies, Karle took a position in
Albany, New York with the
New York State Department of Health, where he developed a method to measure dissolved
fluoride levels, a technique that would become a standard for
water fluoridation. and the
American Philosophical Society in 1990. ==Research and Nobel Prize==