It was dark

 

I couldn't pass up this article about a possible sighting of dark matter by astronomers. I provided their description of it as the title of the post.

After a Century of Searching, We May Have Finally Seen Dark Matter

"Many researchers believe dark matter consists of WIMPs, weakly interacting massive particles, perhaps 500 times heavier than protons. Theory predicts that when two WIMPs collide, they annihilate each other and release gamma rays with specific energies.

[Prof. Tomonori] Totani and team found exactly that signature in Fermi telescope data, gamma rays with 20 billion electronvolts of energy forming a halo structure extending toward the galactic center. The shape matches theoretical predictions for dark matter distribution. The energy spectrum matches WIMP annihilation models and the frequency of collisions falls within predicted ranges. Crucially, more common astronomical phenomena can't easily explain these gamma rays. Other known sources don't produce this energy signature in this distribution pattern."

The rest of the article basically indicates that more research is needed.