LIGO gravitational wave detection (GW150914): Referenced in Chs. 1, 40 - CMB (COBE, WMAP, Planck): Referenced in Chs. 40 - Higgs boson discovery: Referenced in Chs. 24, 40 - Bose-Einstein condensate (Cornell & Wieman, 1995): Referenced in Chs. 23, 40