Christmas in Nazi Germany was a Christian reinvention of the Germanic god Odin. Accordingly, holiday posters were made to depict Odin as the "Christmas or Solstice man", riding a white charger, sporting a thick grey beard and wearing a slouch hat, carrying a sack full of gifts. Other changes were made to the manger, which was replaced by a Christmas garden containing wooden toy deer and rabbits; Mary and Jesus were also depicted as a blonde mother and child. The Christmas tree was also changed. The traditional names of the tree, "Christbaum" or "Weihnachtsbaum", was renamed in the press as fir tree, light tree
Emmanuel David Tannenbaum subsequently devoted his research to studying various problems in evolutionary dynamics using quasispecies models. His seminal work centered on the key question of the evolutionary advantages of sexual reproduction. Tannenbaum demonstrated a strong selective advantage for sexual reproduction with fewer and much less restrictive assumptions than previously considered. Closely related to this line of reasoning, was the original work by Tannenbaum and James Sherley on the immortal strand hypothesis. Tannenbaum also proposed a pioneering theory of why higher organisms need sleep. Towards the end of his life, he proposed a new approach to anti-stealth technology based on the theory of