Detection of B - mode polarization at degree angular scales by BICEP2. (sciencenews.org)
Another experiment carried out in 1990 at the South Pole by Phil Lubin of the University of California at Santa Barbara and his colleagues may have detected primordial ripples at angular scales of 1.5 degrees, though they are not yet convinced that they can rule out a galactic origin for their signal. (newscientist.com)
So we put these two ideas together, applying Asantha's mapping approach to new wavelengths, and decided that the best way to get at the extragalactic background was to measure spatial fluctuations on angular scales around a degree. (sciencedaily.com)