Who has more scope of profession, Juan José Campanella or Robert Z. Leonard?
Robert Z. Leonard Robert Zigler Leonard (October 7, 1889 – August 27, 1968) was an American film director, actor, producer, and screenwriter.
Leonard P. Guarente Leonard Pershing Guarente (born 1952) is an American biologist best known for his research on life span extension in the budding yeast "Saccharomyces cerevisiae", roundworms ("Caenorhabditis elegans"), and mice. He is a Novartis Professor of Biology at the Massachusetts Institute of Technology.