General relativity Quote by Lee Smolin

We're going to need a definitive quantum theory of gravity, which is part of a grand unified theory - it's the main missing piece.

— Kip Thorne

The quest for a quantum gravity is one of the greatest unsolved problems in all of science.

— Michio Kaku

“general relativity and quantum mechanics cannot both be right,”

— Brad S. Gregory

“The key question for a quantum theory of gravity is then the following: Can we extend to quantum theory the principle that space has…

— Lee Smolin

While the finish given to our picture of the world by the theory of relativity has already been absorbed into the general scientific consciousness,…

— Niels Bohr

Quantum mechanics as it stands would be perfect if we didn’t have the quantum-gravity issue and a few other very deep fundamental problems.

— Gerard 't Hooft

“Now, at the outset of the twenty-first century, we stand on the verge of a new revolution. The search for a deeper theory than…

— Marcus Chown

“Besides the argument based on the unity of nature, there are problems specific to each theory that call for unification with the other. Each…

— Lee Smolin

“General Theory of Relativity.”

— Lee Vickers

One of the main successes of string theory is that it has been able to unify the general theory of relativity, which describes gravity,…

— Ashoke Sen

“These two discoveries, of relativity and of the quantum, each required us to break definitively with Newtonian physics. However, in spite of great progress…

— Lee Smolin

“Scientists have been trying to unify Einstein’s Theory of Relativity and Quantum Mechanics.”

— Lee Vickers