2119x1460pxalbert einstein and niels bohr, 1925, casual, discussion, personalities of the twentieth century, niels henrik david bohr, niels bohr danish physicist
2112x1584pxalbert einstein, portrait, theoretician physician, scientist, personality of the 20th century, professor, theory of relativity
1644x2052pxalbert einstein, 1921, portrait, theoretician physician, scientist, personality of the twentieth century, genius
2008x2448pxalbert einstein, 1921, sad look, portrait, theoretician physician, scientist, personality of the twentieth century
