Explore the fascinating world of giant rock concretions in this 21-minute educational video. Discover the locations where these intriguing geological formations can be found, including the Valley of the Moon and Torysh Valley. Learn about the composition and formation processes of these rock balls, distinguishing them from geodes. Delve into the underground growth mechanisms of concretions and examine specific examples like iron-rich rock balls in Utah and the mysterious "Martian Blueberries." Gain insights into the scientific understanding of these unique geological phenomena and their significance in Earth and planetary sciences.