Self-interacting dark matter has also been postulated as an explanation for the DAMA annual modulation signal. commentary The Possible First Signs of Self-interacting Dark Matter Moreover, it is shown that it can serve the seed of supermassive black holes at high redshift. "How a supermassive black hole originates: Study points to a seed black hole produced by a dark matter halo collapse." ScienceDaily, 16 June 2021.
