Konstantin Tsiolkovsky Scientist 1857-09-05 Books by Konstantin Tsiolkovsky Vne Zemli View on Amazon Putʹ k zvezdam View on Amazon Dreams of Earth and Sky View on Amazon As an Amazon Associate we earn from qualifying purchases. Quotes by Konstantin Tsiolkovsky The Earth is the cradle of humanity, but mankind cannot stay in the cradle forever. Read quote My entire life consisted of musings, calculations, practical works, and trials. Many questions remain unanswered; many works are incomplete or unpublished. The most important things still lie ahead. Read quote
