Danish scientist, Niels Bohr (Oct. 7, 1885 - 1962), was one of the pre-eminent physicists of the 20th century. He received a Nobel Prize in 1922 for his charting of the hydrogen atom. His later, more significant work was in quantum physics and in the late 1920s/early 1930s he gathered all the important European physicists in Copenhagen for discussions and theoretical work at Copenhagen University.
After the rise of Nazism Bohr, whose mother was Jewish, became more politicized and although he tried to remain in Denmark during WW II he was forced to flee to Britain and subsequently the US. After his work on the Manhattan project and having seen the results of nuclear weapons being used on Japan he became an advocate for disarmament and peaceful co-existence based on completely free sharing of scientific knowledge.
In this photo from 1907, Niels is shown with his brother Harald (left). Both Bohr boys were excellent footballers, and Harald won an Olympic Silver Medal with the Danish team in 1908...
