Even though we cannot physically access the 4D world, being aware of its existence will pave the way to future discoveries and a better understanding of our Universe.
Greene, a leader in the field of super string theory has been researching his theory for decades. He is one of a small cadre of physicists at the forefront of discovering one unifying theory, a dream Albert Einstein worked on for the last 30 years of his life.
Scientists fail to find hidden dimensions, but will continue looking.
A group of three researchers from KEK, Shizuoka University and Osaka University has for the first time revealed the way our universe was born with 3 spatial dimensions from 10-dimensional superstring theory in which spacetime has 9 spatial directions and 1 temporal direction. This result was obtained by numerical simulation on a supercomputer.
(PhysOrg.com) -- Did the early universe have just one spatial dimension? That
(PhysOrg.com) -- Several speculative theories in physics involve extra dimensions beyond our well-known four (which are broken down into three dimensions of space and one of time). Some theories have suggested 5, 10, 26, or more, with the extra spatial dimensions "hiding" within our observable three dimensions. One thing that all of these extra dimensions have in common is that none has ever been experimentally detected; they are all mathematical predictions.
