what field did the last scientist study?
Mathematics and physics
Early life
mathematics and physics 
who headed up the manhattan project in britain James Chadwick who is he? He was a British physicist. what was he known for? His discovery of the neutron. can you describe this thing he discovered? It is a subatomic particle, symbol or which has a neutral (not positive or negative) charge and a mass slightly greater than that of a proton. why was the above project started? It helped initiate the effort to build the first atomic bombs in the United States during World War II, and helped carry it through to completion in August 1945 by supplying crucial expertise. any other scientist were involved in it? Sir Geoffrey Taylor, James Tuck, Niels Bohr, Peierls, Frisch, and Klaus Fuchs
Theoretical physicist Theoretical physics. He supplied information from the American, British, and Canadian Manhattan Project to the Soviet Union during and shortly after World War II.
Klaus Fuchs Klaus Fuchs Klaus Fuchs
Introduction Introduction Introduction
Klaus Emil Julius Fuchs (29 December 1911 – 28 January 1988) was a German theoretical physicist  Klaus Emil Julius Fuchs (29 December 1911 – 28 January 1988) was a German theoretical physicist and atomic spy who supplied information from the American, British, and Canadian Manhattan Project to the Soviet Union during and shortly after World War II. While at the Los Alamos National Laboratory, Fuchs was responsible for many significant theoretical calculations relating to the first nuclear weapons and, later, early models of the hydrogen bomb. After his conviction in 1950, he served nine years in prison in the United Kingdom and then moved to East Germany where he resumed his career as a physicist and scientific leader.
 Klaus Emil Julius Fuchs (29 December 1911 – 28 January 1988) was a German theoretical physicist and atomic spy who supplied information from the American, British, and Canadian Manhattan Project to the Soviet Union during and shortly after World War II. 
wiki:7675253
Klaus Fuchs [SEP] Early life
He became involved in student politics, joining the student branch of the Social Democratic Party of Germany (SPD), a party that his father had joined in 1912, and the "Reichsbanner Schwarz-Rot-Gold", the party's paramilitary organisation. His father took up a new position as professor of religion at the Pedagogical Academy in Kiel, and in the autumn Fuchs transferred to the University of Kiel, which his brother Gerhard and sister Elisabeth also attended. Fuchs continued his studies in mathematics and physics at the university. In October 1931, his mother committed suicide by drinking hydrochloric acid. The family later discovered that his maternal grandmother had also taken her own life.