Five Nobel Physics Laureates under the Christmas tree. From Left to right, Marie Sklodowska-Curie (1867-1934), Niels Bohr (1885-1962), Enrico Fermi (1901-1954), Albert Einstein (1879-1955), and Paul Dirac (1902-1984). (Marie Curie image, c. 1920s, by Henri Manuel (1874–1947); Niels Bohr image, c. 1922, from the Niels Bohr's Nobel Prize biography; Enrico Fermi image, c. 1943-1949, from the US National Archives and Records Administration; Albert Einstein image, 1921, by Ferdinand Schmutzer (1870-1928); Paul Dirac image, 1933, from the Paul Dirac Nobel Prize biography; and, background image (modified) by Kgbo; all from Wikimedia Commons. Boxes created using Inkscape)