The book will appeal to everybody interested in understanding the major problems in the development of physics in the twentieth century, historical progress and the views of famous researchers. A further thread is the relationship between physics and philosophy.

I.- What Problems of Physics and Astrophysics Seem Now to Be Especially Important and Interesting?.- What Problems of Physics and Astrophysics Seem Now to Be Especially Important and Interesting (Thirty Years Later, Already on the Verge of the 21st Century)?.- II.- How Does Science Develop? Remarks on The Structure of Scientific Revolutions.- Who Created the Theory of Relativity and How Was It Developed? A Review with a Preamble and a Commentary.- Does Astronomy Need `New Physics¿?.- Physical Laws and Extraterrestrial Civilizations.- Wide Scope and Up-to-Date Information as a Precondition of Successful Research.- Physics Stays Young. A Way of Answering the Questionnaire in Nauka i Zhizn¿ Magazine.- On Popular Science and More.- Notes on the Occasion My Jubilee.- A Scientific Autobiography ¿ an Attempt.- III.- About Igor EvgenevichTamm.- A Piece of Advice Given by Leonid Isaakovich Mandelshtam.- On the 90th Anniversary of the Birth of Nikolai Dmitrievich Papaleksi.- About Lev Davidovich Landau.- To the Memory of Aleksandr Aleksandrovich Andronov.- About Aleksandr Lvovich Mints.- In Commemoration of Sergei Ivanovich Vavilov.- A Story of Two Directors.- To the Memory of Ilya Mikhailovich Frank.- About Grigorii Samuilovich Landsberg.- To the Memory of Evgenii Konstantinovich Zavoiskii.- About Matvei Samsonovich Rabinovich.- Mstislav Vsevoldovich Keldysh.- About Albert Einstein.- In Memory of Niels Bohr.- About Richard Feynman ¿ a Remarkable Physicist and a Wonderful Man.- John Bardeen and the Theory of Superconductivity.- On High-Energy Astrophysics (On the 80th Birthday of Jan Oort).- The Sakharov Phenomenon.- Notes on A. I. Solzhenitsyn, A. D. Sakharov, and the `Crosswind¿.- About the Author.