lyas'ki-masyas'ki

Video: Merry Christmas from Charlie the venus flytrap

Cover of Konstantin Tsiolkovsky’s 1914 version of “Исследование мировых пространств реактивными приборами” (“The Exploration of Cosmic Space by Means of Reaction Devices”), initially published in 1903. This was the first text to seriously demonstrate the possibility of spaceflight, outlining several foundational principles of rocketry, including the use of a multistage rocket fueled by liquid oxygen and hydrogen.