Premarital cohabitation has increased significantly, and more than 70% of US couples now cohabit before marriage. The major reason supporting premarital cohabitation is that it enables the couple to get know each better and to see whether they get along well enough to embark on marriage.
Robert J. Muller, Sr. Robert J. Muller, Sr., born December 23, 1921 in Yonkers, N.K., died on Saturday, February 7, 2009. He was the son of Charles Frederick and Angele (Hansberger) Muller. Survived
Muller was a member of the research team at Columbia University that, under Thomas Hunt Morgan, developed the theory of chromosomal heredity from 1910 to 1915. Like his colleagues, Muller studied mutations and sought to map genes to specific chromosomes.