Dark Matter Could Be Warm

Research from Liang Gao and Tom Theuns of the University of Durham, UK has shown that dark matter may be made of light, fast particles.

Gao and Theuns modelled the behaviour of warm (light and fast) and cold (heavy and slow) dark matter particles. They found that cold dark matter coalesces into blobs, but warm dark matter grows chaotically, forming filaments.  Small, slow-burning stars without heavy elements, such as those that have been found in the Milky Way, could have been formed  in these filaments.