Adventure Quote by Michio Kaku

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

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

“Problem 1: Combine general relativity and quantum theory into a single theory that can claim to be the complete theory of nature. This is…

— Lee Smolin

“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

The extreme weakness of quantum gravitational effects now poses some philosophical problems; maybe nature is trying to tell us something new here: maybe we…

— Richard P. Feynman

“So, in the end, the most improbable and hence the most puzzling aspect of space is its very existence. The simple fact that we…

— Lee Smolin

“The unsolved problems of the physical world now seem even more formidable than those solved in the twentieth century. Though in application it works…

— Gerald Holton

“The loop approach to quantum gravity is now a thriving field of research. Many of the older ideas, such as supergravity and the study…

— Lee Smolin

If all this damned quantum jumping were really here to stay, I should be sorry, I should be sorry I ever got involved with…

— Erwin Schrodinger

“So the challenge for any quantum theory of gravity is to give us a deeper understanding of Bekenstein's entropy and Hawking's temperature.”

— Lee Smolin

“Every problem in quantum physics had to be first “solved” using classical physics, and then be reworked by the judicious insertion of quantum numbers…

— John Gribbin

The problem is that replacement of Quantum Mechanics by Quantum Field Theory is still very demanding.

— Martin Fleischmann