July 20 (UPI) -- Those born on this date are under the sign of Cancer. They include: -- Macedonian leader Alexander the Great in 356 B.C. -- Poet Petrarch in 1304 -- Pope Innocent IX in 1519 -- Monk/botanist Gregor Johann Mendel in 1822 -- Explorer Edmund Hillary in 1919 -- Artist Nam June Paik in 1932 -- Writer Cormac McCarthy in 1933 -- Former Sen. Barbara Mikulski, the longest serving woman in U.S. Congress history, in 1936 (age 89) File Photo by Pat Benic/UPI -- Actor Diana Rigg in 1938 --