Particle Physics & Astrophysics
Scientists say collisions between dark matter particles might be the cause of a curious excess of gamma-ray light coming from the center of our galaxy.
The Cosmic Microwave Background, leftover light from the big bang, carries a wealth of information about the universe—for those who can read it.
Scientists studying five years of data from the Fermi Gamma-ray Space Telescope have found the first gamma-ray variable pulsar. But is it really what it seems?