Longitudinal fissure Longitudinal fissure The longitudinal fissure (or cerebral fissure, median longitudinal fissure, or interhemispheric fissure) is the deep groove that separates the two hemispheres of the vertebrate brain. The medial surfaces of the two hemispheres are as similarly convoluted by gyri and sulci as is the outer surface of the brain. It is thought that a majority of existing animals, including Homo sapiens, have evolved from a common wormlike ancestor that lived around 600 million years ago, called the urbilaterian. A bilaterian animal is one that has symmetrical left and right body halves. While it is still debated whether this species
David Sylvian Fripp invited Sylvian to sing with progressive rock stalwarts King Crimson. Sylvian declined the invitation, but he and Fripp recorded the album "The First Day" released in July 1993. Something of a departure for Sylvian, the album melded Sylvian's philosophical lyrics to funk workouts and aggressive rock stylings very much in the mould of Fripp's King Crimson. To capitalise on the album's success, the musicians went back out on the road in the autumn of 1993. A live recording, called "" and released in 1994, was culled from the final shows of the tour. Sylvian and Fripp's final collaboration was