The most popular quantum gravity theory says that particles and forces arise from the vibrations of tiny loops — or strings — just 10 - 35 metres long. (newscientist.com)
The two physicists have not yet managed to discover whether their general gravity theory makes such predictions, but they are not hopeful. (newscientist.com)
Future observations of gravitational waves may lead to further insights about how a quantum gravity theory would work. (newscientist.com)