Scientist, Mathematician. He was a noted historian for his studies of the exact sciences (or the studies of the history of science) and mathematician. He was a contributor to the history of ancient Babylonian history, which was the study or recording of celestial objects during the early history of Mesopotamia. In his studies, he worked to understand how the ancient Babylonian people conceived their computational schemes. He was born Asger Hartvig Aaboe to Johannes Niels Aaboe (an officer in the Danish Army) and his wife Erna Oda Lezinka Nielsen Aaboe in Copenhagen, Denmark. He was schooled as a child in his native country and later attended the Ostre Borgerdyed Skole in Copenhagen, Denmark, where J.L. Heiberg, who produced masterly editions of Greek mathematical and astronomical classics, and had been headmaster from 1884 to 1896. He graduated from the Ostre Borgerdyd Skole in 1940 and then attended the prestigious University of Copenhagen in Copenhagen, Denmark. While attending the University of Copenhagen, Germany had invaded Denmark on April 9, 1940, and although institutes continued to function normally the Danish government was dissolved. This however did not affect his ability to keep up with studies of astronomy, mathematics, physics, and chemistry. He was highly influenced by Harald Bohr and upon his graduation, with a Candidatus Magisterii from the University of Copenhagen in 1947 he delivered a thesis, "The Determination Of Areas And Volumes In Antiquity, Especially In The Works Of Archimedes." He travelled to the United States after he was appointed a visiting lecturer at Washington University in St. Louis, Missouri, in 1948. That same year, he returned to Copenhagen, Denmark, and took up a position at the Birkerod Statsskole and was appointed Adjunkt in Mathematics. He met Joan Armstrong while both were teachers at Washington University in St. Louis, Missouri, and he would marry her in Kirkwood, Missouri, on July 14, 1950. The couple would have four children together. He continued his appointment at the Birkerod Statsskole until he immigrated to the United States after being offered a position as Instructor in Mathematics at Tufts College (later changing its name to Tufts University in 1954) in Medford, Massachusetts, in 1952. In 1954, he wrote and published the paper "Al-Kashi's iteration method for the determination of sin 1°" while continuing his interest in history and mathematics. In 1955, he attended Brown University in Providence, Rhode Island, and studied under the Austria-American mathematician Otto Eduard Neugebauer. He received his Ph.D. in the History of Science from the University in 1957. In 1958, he wrote and published the dissertation "On Babylonian Planetary Theories." He then returned to Tufts University in Medford, Massachusetts, and served as an Associate Professor beginning 1959. He then joined the Department of the History of Science and Medicine at Yale University in New Haven, Connecticut, in 1961, and served as Associate Professor of the Mathematics Department in 1962. He was made a full Professor of the Department of the History of Science and Medicine and Mathematics Department in 1967, and served in the position until 1977. He was made a Professor of the Department of Near Eastern Languages and Literatures and served in that position beginning in 1977. Among his students at Yale University were astrophysicist Noel Swerdlow, mathematician and assyriologist Alice Slotsky, and mathematician Christopher Anagnostakis. He was elected to the Royal Danish Academy of Sciences and Letters in 1975, and served as President of the Connecticut Academy of Arts and Sciences from 1970 to 1980. He was a member of several scholarly societies and besides his numerous papers and dissertations, he was the author of several other works including, "Episodes From The Early History Of Mathematics" (1964), "Scientific Astronomy, Philosophical Transactions Of The Royal Society Of London" (1974), "Mesopotamian Mathematics, Astronomy and Astrology," "The Cambridge Ancient History" (1991), and "Episodes From The Early History Of Astronomy" (2001). For his contributions to the field of mathematics, he was awarded the Guggenheim Fellowship for Humanities, US & Canada in 1964. He retired from Yale University in 1992. His wife Joan passed away in 1990 and he married for the second time to Izabela Zbikowska in 2006. He passed away following a brief illness at his home in North Haven, Connecticut, on January 19, 2007, at the age of 86. He was cremated and his ashes were spread in the Long Island Sound, off the coast of Connecticut.