Gamma-rays from Blazars and the Extragalactic Background Light
  Recent observations of blazars at high energy (HE, 0.1-100 GeV) and very high
energy (VHE, >0.1 TeV) have provided important constraints on the intensity and
spectrum of the diffuse Extragalactic Background Light (EBL), shedding light on
its main origin. Several issues remain open, however, in particular in the mid-
and far-infrared bands and in the blazar emission at multi-TeV energies. This
review summarizes the observational and theoretical progress in the study of
the EBL with gamma-rays and the most promising future improvements, which are
mainly expected from spectra in the multi-TeV range.
