31. Simone Speziale and collaborators have also applied twistor string theory to loop quantum gravity . 32. This raised new hopes for the canonical quantum gravity programme. 33. It could cure diseases, design starships, and express an exquisite theory of quantum gravity . 34. The vacuum of quantum gravity treats gravitational effects not included in the Standard Model. 35. Spin foam formulations of quantum gravity use different degrees of freedom and different Lagrangians. 36. One of the deepest problems in modern physics is the problem of quantum gravity . 37. Another of Deser's research interests is covariant quantum gravity . 38. When we understand what to do with time in quantum gravity we'll have it done. 39. Alternative theories are M-theory and loop quantum gravity ." 40. The duality represents a major advance in our understanding of string theory and quantum gravity .
