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The mysteries of left-handed people

By Perri Klass, M.D. | New York Times | Updated: 2011-03-20 07:24

The mysteries of left-handed people

Gerald Ford was usually cited as left-handed. Ronald Reagan wrote with his right hand but used his left for many tasks. Bill Clinton was fully left-handed. Agence France-Presse / Getty Images, Left and Center; Richard Perry / The New York Times

The mysteries of left-handed people

Humans are asymmetric animals. Early in our embryonic development, the heart turns to the left. The liver develops on the right. The left and right lungs have distinct structure.

The mysteries of left-handed people

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