Surprise gamma-ray discovery could shed light on cosmic mystery
An unexpected and unexplained gamma-ray signal from beyond the Milky Way found among 13 years of NASA Fermi Telescope data could be linked to another cosmic mystery.
TroibNews 
An unexpected and unexplained gamma-ray signal from beyond the Milky Way found among 13 years of NASA Fermi Telescope data could be linked to another cosmic mystery.
