Bohr's first theoretical science paper was about the tension of liquids. Bohr performed all the experiments by himself, but he did not write the paper, due to his poor handwriting, instead he requested someone else to write for him and submitted after the deadline. This paper was also amended and sent it to Danish National Academy, and won a golden medal prize (Pais 102). In 1909, his brother Harald received a master degree before Neils received his in mathematics. .
Two years later in 1911, Niels received his doctorate degree in Physics. In 1911, his father pasted away and he also got engaged with Ellen. Later that year, he went to Cambridge, England continued his post-doctoral education. He carried his Ph.D. thesis translation, after he arrived in Cambridge, Bohr worked under Joseph John Thomson, who won the Nobel Prize in 1906 for his discovery of the electron, and also J.J Thomson who was the director of Cavendish, a world leading Physics -experimental center. Bohr also studied the properties of atoms with James Rutherford after he moved to Manchester. Niels developed a model of atomic structure using Rutherford's description of nucleus and Planck's quantum theory. In 1920, Bohr moved back to Copenhagen University and became the head of Institute for Theoretical Physics department. This Institute was named after Bohr, and the department became a world leading center of quantum mechanics. .
n the 1920's, Niels Bohr first met Albert Einstein and debated the quantum theory of light. This was a famous science debate that last for 30 years. Einstein disapproved Bohr's hypothesis about the light quantum in his theory. During the WWII, Germany conquered Demark. The Nazis tried to capture Bohr as a prisoner, because his mother had Jewish background. Bohr melted his Noble Prize into a silver container and he escaped Denmark to Sweden and took a plane to London. He eventually arrived in United States.