(Caption) Does a spinning massive object wind up spacetime? Credit: J Bergeron / Sky and Telescope Magazine. An APOD for 7 November 1997.
It has been reported that a recent scientific paper delivers the conclusion that our universe resides inside a black hole in another universe – which is not exactly what was concluded. Also, that work delivers some more interesting, or at least more tangible, ideas about how our early universe may have unfolded.
The Einstein-Cartan-Kibble-Sciama (ECKS) theory of gravity – claimed as an alternative to general relativity theory, although still based on Einstein field equations – seeks to take greater account of the effect of the spin of massive particles. Essentially, while general relativity has it that matter determines how spacetime curves, ECKS also tries to capture the torsion of spacetime, which is a more dynamic idea of curvature – where you have to think in terms of twisting and contortion, rather than just curvature.