Niels Bohr | Danish physicist | Britannica.com Encyclopaedia Britannica http://www.britannica.com/biography/Niels-Bohr Encyclopaedia Britannica http://www.britannica.com/biography/Niels-Bohr Encyclopaedia Britannica Encyclopaedia Britannica Encyclopaedia Britannica Encyclopaedia Britannica Niels Bohr | Danish physicist | Britannica.com Encyclopaedia Britannica Encyclopaedia Britannica