Humberto Fernández-Morán Villalobos (February 18, 1924 March 17, 1999) was a Venezuelan research scientist born in Maracaibo, Venezuela, renowned for inventing the diamond knife or scalpel, significantly advancing the development of electromagnetic lenses for electron microscopy based on superconducting technology, and many other scientific contributions. A quick review of his oft-cited peer-reviewed publications in journals of science shows a wide range of scientific research interests, from elucidating mitochondrial membrane structure to compositional analyses of lunar rock obtained in the course of NASA's Apollo missions.