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James Scargill, a physicist at the University of California, has written a paper reporting that the laws of physics allow for the existence of a life-supporting two-dimensional universe. MIT's Technology Review has reviewed the paper and found that the work does show that such a 2+1 universe could exist.
Because we live in three-dimensions, it is difficult for us to envision a universe in which the third dimension does not exist—or one in which there is a fourth or fifth dimension. But philosophers and physicists have spent a lot of time and work trying to figure out if life could exist in anything but the three dimensions we know. In such discussions, time is also included, which has led to the description of what we experience as a 3+1-dimensional universe.
TR - Notes - Physicists - Universe - One
As TR notes, most physicists have concluded that our 3+1-dimensional universe is the only one that could support life. They point out that with more than three dimensions, Newton's laws of motion would be susceptible to problems with tiny perturbations, which would prevent the formation of orbits—like planets around a sun. So that is...
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