Question R16 Q3 - NSB Regional 2007

Which of the following recently gave what many think as irrefutable evidence for the existence of dark matter:

W) the discovery of gravitational waves at the LIGO facility at Pacific Northwest National Lab

X) Chandra X-ray images of hot gases during a violent merger of the “bullet cluster” of galaxies

Y) creation of quark-gluon plasma at the Relativistic Heavy Ion Collider

Z) the finding that neutrinos account for more mass of the universe than all the stars in the universe

Science Bowl Question