M stands for Magic, Mystery, or Matrixaccording to taste.

1/r^2 has a nasty singularity at r=0, but it did not bother Newton-the Moon is far enough..

Quantum mechanics brought an unexpected fuzziness into physics because of quantum uncertainty, the Heisenberg uncertainty principle. String theory do….

There was a long history of speculation that in quantum gravity, unlike Einstein's classical theory, it might be possible for the topology of spaceti….