
Strange ‘sticky’ dark matter could be lurking in a distant galaxy
Galaxy SDSS J0946+1006 acts as a gravitational lens, helping astronomers see the signs of dark matter NASA/ESA/R. Gavazzi, T. Treu/University of California/SLACS An unusually dense galaxy could be the first clear evidence for the existence of an unconventional form of “sticky” dark matter, altering our understanding of this mysterious cosmic substance. In the standard picture…