Sergey Ryazanskiy is a pilot-astronaut, Ph.D. After two successful space missions he became a successful motivational speaker. He has made over 300 appearances by now both in Russia and abroad. All his lectures include photos and video footage made during his training, living and working on ISS, outer space missions, debriefs upon return to Earth and so on. He has also written two books in Russian, a book in English is on the way.
