A couple of months ago was announced the launch of the online edition of The Feynman Lectures on Physics Vol. I (mainly mechanics, radiation, and heat). Well, now the Vol. III (quantum mechanics) is available, and Vol. II (mainly electromagnetism and matter) is comming soon. A real jewel at different levels (educational, informative, conceptual …), to have always on hand in your favorites.
Oral history interviews with leading scientists (including transcripts and voice clips) from the Center for History of Physics and the Niels Bohr Library & Archives at the American Institute of Physics.
Interview with Dr. Richard Feynman
At Altadena, California
March 4, 1966
Mathemata mathematicis scribuntur.
Notice: Although the literal translation of this phrase as it appears in the prologue of “the revolutionibus orbium coelestium" (On the Revolutions of the Heavenly Spheres) would be “Mathematics is written for mathematicians”, in some modern translations (such as this one) has been rendered as “Astronomy is written for astronomers" taking into account meaning in the historical context, and the specific situation of the phrase in a prologue to Pope Paul III, to whom Copernicus dedicated his work. (Source info)