Emily Arnesen (14 June 1867 – 13 August 1928) was a Norwegian zoologist. She was the second Norwegian woman to receive a doctoral degree and is most known for her studies on sponges. Early life Arnesen began attending the Royal Frederick University of her hometown Kristiania in 1891. She studied science, but was only able to stay for a year, until 1892, before leaving for Stockholm, where she became a governess for a minister's family. Arnesen would periodically return to being a governess for different families throughout the course of her studies in order to make an income. During her time in Stockholm, Arnesen began taking classes which sparked her interest in both zoology and botany. Upon returning to the university of Kristiania, Arnesen began teaching classes and private pupils, but spent her free time studying zoology under Johan Hjort. This continued for three years until she left the university and began working in laboratories. Adult life Arnesen first attempted to study zoology in a lab in Berlin in 1894, but was rejected. After this, she would teach in Kristiania schools as well as work in the zoological laboratory in town during the school year and studied coastal fauna at the Norwegian coastal biological stations in the summer. In 1901 Arnesen received a scholarship that allowed her to travel to Zurich in Switzerland. This is where Arnesen completed her doctoral studies on the blood vessel system structure in leeches under the supervision of anatomist Arnold Lang. She received her doctorate in 1903. After receiving her doctorate, Arnesen spent four months at the zoological museum in Amsterdam. Here, under Max Carl Wilhelm Weber, she was responsible for a collection of animals that she had grown interested in during her time working on the coasts of Norway: sponges. In 1905 Arnesen became a conservator of the Kristiania zoological museum, a position she held until 1926, when she retired due to poor health. From 1906 to 1913 gave lectures on invertebrates at the Royal Frederick University. Involvement in social issues Outside of her biological interests, Arnesen was also present in many social circles and active in political life, especially concerning the rights of women and suffrage. She was a member of the executive committee of the Norwegian Women's Union and frequently wrote for newspapers on topics ranging from professional matters to social issues. Published works Arnesen published her first paper in 1898 on