One of the cornerstones of inflationary cosmology is that the large
scale structure of the Universe has a quantum mechanical origin. This
invites the question of whether compelling observational evidence for
the quantum nature of the origin can be found. Primordial
gravitational waves are generated directly from quantum fluctuations
during inflation. Since they interact with matter very weakly, travel
through the Universe virtually unimpeded, it is expected that they
keep their nonclassicality until today. In this talk, I will present

All black holes in the Universe are believed to be rotating. This poses interesting questions, since rotating black hole solutions of Einstein’s equations of General Relativity possess a so-called Cauchy horizon in their interior, which threatens the predictability of Einstein’s theory. However, these exact solutions may not model sufficiently accurately black holes in Nature, which have classical matter in their neighbourhood and, furthermore, are inevitably surrounded by a quantum vacuum (which is responsible for Hawking radiation).

The spectrum of positrons in cosmic rays is currently measured with unprecedented precision by AMS-02 up to TeV energies, and represents an unique probe for the local properties of our Galaxy. Currently, its interpretation is still debated, especially for the excess above 10 GeV which suggests the presence of a local, primary source.
Recently, the observation of extended gamma-ray halos around Galactic pulsars has opened a new window to constrain the acceleration and propagation of positrons in our Galaxy.

In this talk I'll give recent news from workshop on Cosmic Rays and Neutrinos which was organised in APC and UCLouvain. I'll show several new experimental and theoretical results presented at this workshop 
 from the fields of  high energy neutrinos, gamma-ray astronomy and cosmic rays.