Anti-de Sitter space bell. It might be described as being the "opposite" of the surface of a sphere, which has a positive curvature. General relativity is a theory of the nature of time, space and gravity in which gravity is a curvature of space and time that results from the presence of matter or energy. Energy and mass are equivalent (as expressed in the equation "E" = "mc"), and space and time can be translated into equivalent units based on the speed of light ("c" in the "E" = "mc" equation). A common analogy involves the way that a dip in a flat
E=MC² (Mariah Carey album) with over 12 million units sold. It earned a myriad of music industry awards, and brought Carey back to the top of pop music following her commercial decline in 2001. After completing The Adventures of Mimi Tour, she began working on material for her eleventh studio effort, the yet untitled "E=MC²". "E=MC²" was hailed as one of the most anticipated albums of 2008, with many critics weighing their opinions on whether Carey would be able to deliver significant success, following her achievements with "The Emancipation of Mimi". Carey began writing and producing the music she saw fit, and not anything