This helpful guide describes the physical and emotional changes that occur in boys (and, to a lesser extent, in girls) during puberty and discusses sexual activity, homosexuality, AIDS, and other related topics. Illustrations.[...]

The whole thing was basically an experiment, Richard Feynman said late in his career, looking back on the origins of his lectures. The experiment turned out to be hugely successful, spawning a book that has remained a definitive introduction to physics for decades. Ranging from the most basic prin[...]

'The whole thing was basically an experiment,' Richard Feynman, looking back on the origins of these lectures, said late in his career. It turned out to be a hugely successful one, spawning books that have remained a definitive introduction to all physics for decades. And now, 'Basic Books' is proud[...]

Six lectures, all regarding the most revolutionary discovery in twentieth-century physics: Einsteins Theory of Relativity. No onenot even Einstein himselfexplained these difficult, anti-intuitive concepts more clearly, or with more verve and gusto, than Feynman.[...]