Reality iS in the MATHS - the unreasonable effectiveness of mathematics

 Physics implications of the External Reality Hypothesis (ERH) that there exists an external physical reality completely independent of us humans

The idea that our universe is in some sense mathematical goes back at least to the Pythagoreans, and has been extensively discussed in the literature. Galileo Galilei stated that the Universe is a grand book written in the language of mathematics

See Max Tegmark 

https://arxiv.org/pdf/0704.0646.pdf