While Maha-Visnu sleeps within the Causal Ocean, innumerable universes are generated along with His breathing. These universes are floating, and they are scattered all over the Causal Ocean. They stay only during the breathing period of Maha-Visnu. In each and every universal globe, the same Maha-Visnu enters again as Garbhodakasayi Visnu and lies there on the serpentlike Sesa incarnation. From His navel sprouts a lotus stem, and on the lotus, Brahma, the lord of the universe, is born. Brahma creates all forms of living beings of different shapes in terms of different desires within the universe.
In theoretical physics, M-theory is an extension of string theory in which 11 dimensions are identified. Because the dimensionality exceeds that of superstring theories in 10 dimensions, proponents believe that the 11-dimensional theory unites all five string theories (and supersedes them). Though a full description of the theory is not known, the low-entropy dynamics are known to be supergravity interacting with 2- and 5-dimensional membranes.
This idea is the unique supersymmetric theory in eleven dimensions, with its low-entropy matter content and interactions fully determined, and can be obtained as the strong coupling limit of type IIA string theory because a new dimension of space emerges as the coupling constant increases.
Drawing on the work of a number of string theorists (including Ashoke Sen, Chris Hull, Paul Townsend, Michael Duff and John Schwarz), Edward Witten of the Institute for Advanced Study suggested its existence at a conference at USC in 1995, and used M-theory to explain a number of previously observed dualities, initiating a flurry of new research in string theory called the second superstring revolution.
M-theory, an integration of string theories and beyond postulates extra extended dimensions like our familiar universe. The branes that compose a universe may come in multiples and interact with each other according to some theorists. It is even possible that these branes are spherical and compose shells as pictured in ancient Vedic Cosmology.