Marius Sophus Lie ( / l iː / LEE ; Norwegian: [liː] ; 17 December 1842 – 18 February 1899) was a Norwegian mathematician. He helped develop the theory of smooth, repeating patterns and used it to study geometry and math problems involving rates of change. He also made important contributions to the study of mathematical symbols and rules.
Hans Christian Ørsted (Danish: [ˈɶɐ̯steð]; August 14, 1777 – March 9, 1851), sometimes spelled Oersted, was a Danish chemist and physicist. He discovered that electric currents produce magnetic fields. This discovery is called Oersted’s law.
Christian Jürgensen Thomsen (29 December 1788 – 21 May 1865) was a Danish historian who helped create early ways to study ancient objects. In 1816, he became the leader of a collection of old items that later became the National Museum of Denmark in Copenhagen. While organizing these items for display, he decided to arrange them in order of time using the three-age system.
Harald August Bohr was born on April 22, 1887, and died on January 22, 1951. He was a Danish mathematician and soccer player. After earning his doctorate in 1910, Bohr became a well-known mathematician and helped create the study of almost periodic functions.
Niels Henrik David Bohr (born October 7, 1885; died November 18, 1962) was a Danish scientist who studied how atoms and energy work. He won the Nobel Prize in Physics in 1922 for his important discoveries. He also worked as a philosopher and supported scientific research.
Johannes Andreas Grib Fibiger (April 23, 1867 – January 30, 1928) was a Danish doctor and professor of anatomical pathology at the University of Copenhagen. He received the 1926 Nobel Prize in Physiology or Medicine for his discovery of the Spiroptera carcinoma. He claimed that a type of roundworm, which he called Spiroptera carcinoma (but is correctly named Gongylonema neoplasticum), could cause stomach cancer (squamous cell carcinoma) in rats and mice.
Schack August Steenberg Krogh ForMemRS (15 November 1874 – 13 September 1949) was a Danish professor who worked at the University of Copenhagen from 1916 to 1945. He taught in the department of zoophysiology, which studies how animals function. Krogh made important discoveries in the field of physiology and is known for creating Krogh’s principle.
Niels Ryberg Finsen was born on December 15, 1860, and died on September 24, 1904. He was a doctor and scientist. In 1903, he won the Nobel Prize in Medicine and Physiology for his work in treating diseases, especially lupus vulgaris, using concentrated light radiation.
Valdemar Poulsen was a Danish engineer and inventor who lived from November 23, 1869, to July 23, 1942. In 1898, he created a device called the telegraphone, which was a magnetic wire recorder used to record sound. He also played an important role in early radio technology.
Robert Morane was born on March 10, 1886, in Paris and died on August 28, 1968, in Paris. His brother, Léon Morane, was born on April 11, 1885, in Paris and died on October 19, 1918, in Paris. Both Robert Morane and his brother Léon Morane were French aviation pioneers.