Born this day:
Otto Friedrich Müller (Born 11 Mar 1730; died 26 Dec 1784). German-Danish biologist and microscopist who concentrated on viewing bacteria, as previously seen only dimly by Leeuwenhoek. Despite the limited resolution of the microscopes of his time, Müller was the first to see bacteria with sufficient clarity to divide them into categories, and introduced to the world the new animal kingdom of Infusoria. In 1773, he was the first to describe diatoms. He coined the terms baccilum and spirillum and was also was the first to make a general classification of micro-organisms, following the scheme of Linnaeus. He invented the naturalist’s dredge.
Died this day:
Roy Chapman Andrews (Died 11 Mar 1960; born 26 Jan 1884). American naturalist, explorer, and author, who spent his entire career at the American Museum of Natural History. He led many important scientific expeditions with financial support through his public lectures and books, particularly in central Asia and eastern Asia. On his 1925 central Asian expedition, the first known dinosaur eggs were discovered, also: a skull and parts of Baluchitherium, the largest known land mammal; extensive deposits of fossil mammals and reptiles previously unknown; evidence of prehistoric human life; and geological strata previously unexplored. During his career he was not known as an influential scientist, yet Andrews was the museum promoter, creating immense excitement and successfully advancing research there.