László Egyed (12 February 1914 – 11 July 1970) was a Hungarian geophysicist who published over 100 scientific articles. In 1956 he wrote the book Physics of the solid earth, which was reworked and republished in 1969. Like Ott Christoph Hilgenberg, Samuel Warren Carey and Pascual Jordan, Egyed was a supporter of the expanding Earth theory, an alternative to plate tectonics. He calculated an increase of the Earth's radius by approximately 1 millimeter per year, or a total of 500 kilometers since the Cambrian period. On phenomenological grounds Egyed proposed a possible decrease of the gravitati