Zodiac constellations can be traced even further back, to Bronze Age (First Babylonian dynasty) sources, including Gemini "The Twins", from MAŠ.TAB.BA.GAL.GAL "The Great Twins", and Cancer "The Crab", from AL.LUL "The Crayfish", among others. Around the end of the 5th century BC, Babylonian astronomers divided the ecliptic into twelve equal "signs", by analogy to twelve schematic months of thirty days each. Each sign contained thirty degrees of celestial longitude, thus creating the first known celestial coordinate system. Unlike modern astronomers, who place the beginning of the sign of Aries at the place of the Sun at the vernal equinox; Babylonian astronomers
Boston crab "Backbreaker", before that term became known for its current usage. In modern wrestling, the Boston crab is not treated as a lethal submission maneuver (with the exception of its use by Chris Jericho, who calls it the 'Walls of Jericho'), even though it was considered a match-ending hold in the past. In Japan, it is commonly used as a hold to defeat young and inexperienced wrestlers; the ability to overcome the hold is considered a sign of growth. In submission grappling, the Boston crab (generally the half Boston crab) can be used to set up a straight ankle lock. On