Russian physicist who received the 1978 Nobel Prize for Physics for discovering superfluidity. He worked well for over ten years with fellow Nobel laureate Ernest Rutherford. His study at Cambridge College or university in Britain led him to find a way to better make liquid helium. He visited go to the USSR from Cambridge in 1934, but had not been allowed to come back, and therefore spent the others of his existence in Moscow. He wedded Anna Alekseevna Krylova, girl of another mentioned Russian academic as well as the few got two sons, Sergei and Andrei, collectively. He previously a falling out in clumps with the top from the Russian secret law enforcement and survived because Joseph Stalin selected Pyotr’s part in the dispute.