Original: Niels Henrik David Bohr (; 7 October 1885 – 18 November 1962) was a Danish physicist who made fundamental contributions to understanding atomic structure and quantum mechanics, for which he received the Nobel Prize in Physics in 1922.
Simplified: Niels Bohr (October 7, 1885 - November 18, 1962) was a famous Danish physicist who helped discover quantum physics, the structure of the atom, and the atomic bomb.