JOURNEY FROM THE CENTER OF THE EARTH.

REMOTE submersibles; AERONAUTICS equipment; ZACATON; GEOLOGY of Europa; SATELLITES of Jupiter; STONE, Bill, 1952-

The article focuses on the world's most famous expeditionary caver Bill Stone, head of Stone Aerospace. The article discusses a new autonomous underwater vehicle (AUV) known as Depth X and it's first major field trial in Mexico's Zacaton Cenote, the world's deepest sinkhole. The article also describes Stone's aspirations of using the drone to search for extraterrestrial life on Jupiter's moon Europa. Technological aspects of the drone are discussed.