A Null result on extra dimensions.

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A Null result on extra dimensions.

Postby hyksos on October 8th, 2018, 3:03 am 

Measurements from neutron binary merger rules out the 4th dimension.

Textbook physics says that our universe is 3+1 dimensional. Another exotic hypothesis suggests our universe is 4+1 dimensional. Consider the idea that our universe is a 3-brane, and that it expands into the 4th dimension. Such a theory is a plausible explanation for metric expansion, (or "cosmic expansion") of very distant galaxies. Recent measurements of gravity waves could place an upper bound on the number of extra spatial dimensions beyond the regular 3. The data is in and the math has been done. The results are described in the PBS video below.

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