Biographical note

Albert Einstein (Author)
Regarded as the founder of modern physics, Albert Einstein was born in 1879, in Ulm, Kingdom of Württemberg, German Empire. He completed his Ph.D. from the University of Zürich in 1905 and published four papers in the scientific journal named Annalen der Physik. These papers on photoelectric effect, Brownian motion, special relativity and mass-energy equivalence (E = mc2) were significant contributors to the foundation of modern physics. In the next few years, Einstein came to be recognized as a major scientist.
He developed the general theory of relativity between 1907 and 1915. It was published in 1915. In 1916, Einstein published Relativity: The Special and the General Theory in German. Its first English translation was published in 1920. In 1921, Einstein was awarded the Nobel Prize in Physics "for his services to Theoretical Physics and especially for his discovery of the law of the photoelectric effect." He published numerous scientific and non-scientific works.
Einstein died on 18 April 1955, aged seventy-six, in Princeton, New Jersey.

Stephen Hawking (External Editor)
STEPHEN HAWKING was a brilliant theoretical physicist, generally considered to have been one of the world's greatest thinkers. He was Lucasian Professor of Mathematics at the University of Cambridge and is the author of A Brief History of Time which was an international bestseller. His other books for the general reader include A Briefer History of Time, the essay collection Black Holes and Baby Universe, The Universe in a Nutshell, and Brief Answers to the Big Questions.
He died on 14 March, 2018.