John Frank Allen

John Frank Allen, FRS[1] FRSE (May 5, 1908 – April 22, 2001) was a Canadian physicist. At the same time as Pyotr Leonidovich Kapitsa in Moscow, Don Misener and Allen independently discovered the superfluid phase of matter in 1937 using liquid helium in the Royal Society Mond Laboratory in Cambridge, England.[2] -Wikipedia