Dark Matter from Exponential Growth - PhysRevLett.127.191802 (PDFファイル)https://journals.aps.org/prl/pdf/10.1103/PhysRevLett.127.191802
Dark matter may spawn more of itself from ordinary matter, like a cosmic ice-9 | Live Science https://www.livescience.com/dark-matter-multiplies-cosmic-ice-9