Dark Matter Decays and Slows the Universe's Growth ⚡ экспресс
Original: "Dark Matter with a Drag at Low Redshift"
Dark matter may be slowing its own growth by decaying into invisible radiation.
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The Universe is growing, but in recent epochs—somewhat lazily. Perhaps dark matter itself is to blame: it decays into invisible particles, creating a cosmic wind that prevents galaxies from coming together. This effect has a clear signature, and Euclid and Rubin will soon look for it.
🎯 Dark radiation interacts so weakly with ordinary matter that it passes through Earth almost unnoticed.