Separated at birth, both twins named their sons James and their dogs Toy

The 'Jim twins' were separated as infants and reunited at 39, discovering they'd both become James — married twice, first to a Linda then a Betty, with sons named James Alan. They anchored the Minnesota Study of Twins Reared Apart, one of the largest studies of genetic influence on behavior.

— Thomas J. Bouchard Jr., Minnesota Study of Twins Reared Apart — University of Minnesota, launched 1979