Leó Szilárd ,was an Austro-Hungarian physicist and inventor who conceived the nuclear chain reaction in 1933, patented the idea of a nuclear reactor with Enrico Fermi, and in late 1939 wrote the letter for Albert Einstein's signature that resulted in the Manhattan Project that built the atomic bomb.Szilárd himself did not build all of these devices, and so their credit often went to others. As a result, Szilárd never received the Nobel Prize, but two of his inventions did
