I hope always write about doodle release even late. Nicolas Steno, born 11 January 1638 in Copenhagen. He was dedicated his life in anatomy and geology. He always made his own research for a statement he herd about. He was a pioneer and many contributions counted in paleontology and geology.
Anyway doodle always release a logo according to the character and always unique.
For further info, just go to Wikipedia.com, or just click the doodle logo.