Richard Muller, who is the most talented/technically able physicist you have ever encountered in your career and why? Is it Witten, Weinberg, Feynman or someone else? - Quora
What is M theory? - Quora
What is the difference between M-theory and the Theory of Everything? - Quora
Why haven't we yet discovered white holes? - Quora
Given that the derivation of the Schwarzschild metric assumes empty space apart from a single point, wouldn't that suggest that a black hole singularity is merely an artifact of an inaccurate model? - Quora