Discovery of Cherenkov radiation
1934 — Georges Lemaître interprets the cosmological constant as due to a vacuum energy with an unusual perfect fluid equation of state
Vitamin B1 Formula, R. R. Williams
Nuclear photoelectric effect, Goldhaber, Chadwick
2 September 1934 discovery of 7043 Godart
7 September 1934 discovery of 2664 Everhart
9 September 1934 discovery of 1925 Franklin-Adams
11 May 1934 Death of George Cary Comstock in Madison, Wisconsin, USA
8 July 1934, Death of Edouard-Benjamin Baillaud in Toulouse, Haute-Garonne, France
2 September 1934 Death of Willard James Fisher in Cambridge, Massachusetts, USA
2 December 1934 Death of Thomas Henry Espinall Compton Espin in Tow Law, Durham, England
1934 Death of Santiago Ramón y Cajal
1934 Birth of Phillip James Peebles
1934 Birth of Robert B. Palmer
Chemistry to Harold Clayton Urey "for his discovery of heavy hydrogen"
Physiology or Medicine to George Hoyt Whipple, George Richards Minot and William Parry Murphy "for their discoveries concerning liver therapy in cases of anaemia"