String theorists have approached this problem by finding ways to “compactify” six or seven of these dimensions, or shrink them down so that we wouldn’t notice them. Although the framework can naturally incorporate gravity even on the subatomic level, it implies that the universe has some strange properties, such as nine or ten spatial dimensions. String theory is a potential “theory of everything”, uniting all matter and forces in a single theoretical framework, which describes the fundamental level of the universe in terms of vibrating strings rather than particles. According to their model, only three of the nine dimensions started to grow at the beginning of the universe, accounting both for the universe’s continuing expansion and for its apparently three-dimensional nature. Researchers in Japan have developed what may be the first string-theory model with a natural mechanism for explaining why our universe would seem to exist in three spatial dimensions if it actually has six more. Webinars Tune into online presentations that allow expert speakers to explain novel tools and applications.Video Watch our specially filmed videos to get a different slant on the latest science.Podcasts Our regular conversations with inspiring figures from the scientific community.
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