Albert Einstein Einstein did not return to Germany. He settled in the United States and became an American citizen in 1940. On the eve of World War II, he endorsed a letter to President Franklin D. Roosevelt alerting him to the potential development of "extremely powerful bombs of a new type" and recommending that the US begin similar research. This eventually led to the Manhattan Project. Einstein supported the Allies, but he generally denounced the idea of using nuclear fission as a weapon. He signed the Russell–Einstein Manifesto with British philosopher Bertrand Russell, which highlighted the danger of nuclear weapons. He was
Albert Einstein Science Park Albert Einstein Science Park The Albert Einstein Science Park is located on the hill Telegrafenberg in Potsdam, Germany. The park was named after the physicist Albert Einstein. The best known buildings in the park are the Einstein Tower, an astrophysical observatory that was built to perform checks of Einstein's theory of General Relativity; and the Great Refractor of Potsdam, which today belong to the Astrophysical Institute Potsdam. These buildings, along with various astronomical, meteorological, and geophysical observatories were integrated into an English country garden. The park had already been designed by the middle 19th century according to plans by the