So there's this new proposed theory in the Journal of Cosmology and Astroparticle Physics that applied rainbow functions to prove that different wavelengths of light experience spacetime differently. In essence this means that the universe came from a non-singularity (i.e. discredits the big bang
theory, which states everything comes from a singularity)
http://iopscience.iop.org/1475-7516/2013/10/052/