- On the dimensionality of spacetime (space.mit.edu)
Some superstring theories have more than one effective low-energy limit corresponding to classical spacetimes with different dimensionalities. We argue that all but the (3 + 1)-dimensional one might correspond to ‘dead worlds’, devoid of observers, in which case all such ensemble theories would actually predict that we should find ourselves inhabiting a (3 + 1)-dimensional spacetime. With more or less than one time dimension, the partial differential equations of nature would lack the hyperbolicity property that enables observers to make predictions. In a space with more than three dimensions, there can be no traditional atoms and perhaps no stable structures. A space with less than three dimensions allows no gravitational force and may be too simple and barren to contain observers.
- Electronic body music (Wikipedia)
Electronic body music (EBM) is a genre of electronic music that combines elements of industrial music and synth-punk with elements of dance music. It developed in the early 1980s in Western Europe, as an outgrowth of both the punk and the industrial music cultures. It combines sequenced repetitive basslines, programmed dance music rhythms, and mostly undistorted vocals and command-like shouts with confrontational or provocative themes.