Editing Fridtjof Nansen (section)

== Student and adventurer ==
[[File:Fridtjof Nansen 1880.jpg|thumb|170px|left|Nansen as a student in [[Oslo|Christiania]] (1880, age 19)]]
In 1880 Nansen passed his university entrance examination, the ''[[examen artium]]''. He decided to study [[zoology]], claiming later that he chose the subject because he thought it offered the chance of a life in the open air. He began his studies at the [[Royal Frederick University]] in Christiania early in 1881.<ref>Huntford, pp. 18–19</ref>

Early in 1882 Nansen took "...the first fatal step that led me astray from the quiet life of science."<ref name="Scott15">Scott, p. 15</ref> Professor [[Robert Collett]] of the university's zoology department proposed that Nansen take a sea voyage, to study Arctic zoology at first hand. Nansen was enthusiastic, and made arrangements through a recent acquaintance, Captain Axel Krefting, commander of the [[seal hunting|sealer]] ''[[SS Viking|Viking]]''. The voyage began on 11 March 1882 and extended over the following five months. In the weeks before sealing started, Nansen was able to concentrate on scientific studies.<ref name="Huntford21" /> From water samples he showed that, contrary to previous assumption, sea ice forms on the surface of the water rather than below. His readings also demonstrated that the [[Gulf Stream]] flows beneath a cold layer of surface water.<ref>Reynolds, p. 20</ref> Through the spring and early summer ''Viking'' roamed between Greenland and [[Svalbard|Spitsbergen]] in search of seal herds. Nansen became an expert marksman, and on one day proudly recorded that his team had shot 200 seals. In July, ''Viking'' became trapped in the ice close to an unexplored section of the Greenland coast; Nansen longed to go ashore, but this was impossible.<ref name="Huntford21" /> However, he began to develop the idea that the [[Greenland ice sheet|Greenland icecap]] might be explored, or even crossed.<ref name="Ryne" /> On 17 July the ship broke free from the ice, and early in August was back in Norwegian waters.<ref name="Huntford21">Huntford, pp. 21–27</ref>

Nansen did not resume formal studies at the university. Instead, on Collett's recommendation, he accepted a post as curator in the zoological department of the [[Bergen Museum]]. He was to spend the next six years of his life there—apart from a six-month [[sabbatical]] tour of Europe—working and studying with leading figures such as [[Gerhard Armauer Hansen]], the discoverer of the [[leprosy]] bacillus,<ref>Huntford, pp. 28–29</ref> and [[Daniel Cornelius Danielssen]], the museum's director who had turned it from a backwater collection into a centre of scientific research and education.<ref>Reynolds, p. 25</ref> Nansen's chosen area of study was the then relatively unexplored field of [[neuroanatomy]], specifically the central nervous system of lower marine creatures. Before leaving for his sabbatical in February 1886 he published a paper summarising his research to date, in which he stated that "anastomoses or unions between the different ganglion cells" could not be demonstrated with certainty. This unorthodox view was confirmed by the simultaneous research of the embryologist [[Wilhelm His, Sr.|Wilhelm His]] and the psychiatrist [[August Forel]]. Nansen is considered the first Norwegian defender of the neuron theory, originally proposed by [[Santiago Ramón y Cajal]]. His subsequent paper, ''The Structure and Combination of Histological Elements of the Central Nervous System'', published in 1887, became his doctoral thesis.<ref>Huntford, pp. 65–69</ref>