Hubble looks for dark matter in colliding galactic clusters using theory of gravitational lensing. Image credit: X-ray: NASA/CXC/CfA/M.Markevitch et al.; Lensing Map: NASA/STScI; ESO WFI; Magellan/U.Arizona/D.Clowe et al.; Optical: NASA/STScI; Magellan/U.Arizona/D.Clowe et al., of the Bullet Cluster. Big Bang cosmology has it’s challenges – it also has it’s challengers. Re-posted courtesy of Thunderbolts.info. The EU… Read More Lensing by Refraction…not Gravity?