Dark matter may consist of particles with different masses

Dark matter may consist of particles with different masses

Dark matter keeps getting blamed for the universe’s big patterns while staying stubbornly out of reach. You cannot see it, touch it, or capture it. Yet its gravity helps shape galaxies, and that makes it hard to ignore. For decades, many astronomers have leaned on the cold dark matter model to explain how cosmic structure forms. The model works well on large scales. Trouble starts when you zoom in. As measurements sharpen, a set of small-scale p…