Scientists think dark matter might come in two forms

A mysterious glow of gamma rays at the center of the Milky Way has long hinted at dark matter, but the lack of similar signals in smaller dwarf galaxies has cast doubt on that idea. Now, researchers propose a bold twist: dark matter might not be a single particle at all, but a mix of two different types that must interact with each other to produce detectable signals. The study focuses on a puzzling observation. Astronomers have detected an excess of gamma radiation at the center of the Milky Way, which could be produced when dark matter particles collide and annihilate. However, similar signals have not been foun... [4828 chars]