  It has been recently argued [1-3] that there is a strong component of the
diffuse far-ultraviolet (FUV) background which is hard to explain by
conventional physics in terms of the dust-scattered starlight. We propose that
this excess in FUV radiation might be result of the dark matter annihilation
events within the so-called axion quark nugget (AQN) dark matter model, which
was originally invented for completely different purpose to explain the
observed similarity between the dark and the visible components in the
Universe, i.e. $\Omega_{\rm DM}\sim \Omega_{\rm visible}$. We support this
proposal by demonstrating that intensity and the spectral features of the AQN
induced emissions are consistent with the corresponding characteristics of the
observed excess of the FUV radiation. If the future studies confirm the
puzzling characteristics observed in [1-3] it might unlock a much more deeper
and fundamental problem of modern cosmology-- it may reveal the nature of the
dark matter.
