1. in Princeton, New Jersey , on April 18 , 1955 at the age of 76 from internal bleeding, which was caused by the rupture of an aortic aneurism , leaving the Generalized Theory of Gravitation unsolved. The only person present at his deathbed, a hospital nurse, said that just before his death he mumbled several words in German that she did not understand.

Er stützte seine Überlegungen mit verschiedenen Gedankenexperiment en, unter anderem mit dem viel diskutierten Einstein-Podolsky-Rosen-Experiment .