Of course gravitational waves have been detected. Detection was awarded Nobel Prize in Physics in 1993. It has not been directly detected, but BICEP2 will not d

Of course gravitational waves have been detected. Detection was awarded Nobel Prize in Physics in 1993. It has not been directly detected, but BICEP2 will not directly detect it either. The significance is that this would be an experimental observation of cosmic inflation. How it is observed (gravitational wave) is less important.