Just to be clear, gravity waves have already been indirectly observed and the discovery led to the 1993 Nobel Prize in Physics. BICEP2 is looking for B-mode po

Just to be clear, gravity waves have already been indirectly observed and the discovery led to the 1993 Nobel Prize in Physics. BICEP2 is looking for B-mode polarization on large scales in the CMB because it is believed that gravity waves created in the early universe are the only possible source.