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The first results from the Dark Energy Spectroscopic Instrument (DESI) suggest that dark energy isn't a constant force in the Universe and might actually be decreasing over time.
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The first results from the Dark Energy Spectroscopic Instrument (DESI) suggest that dark energy isn't a constant force in the Universe and might actually be decreasing over time. But this result would require new physics that runs counter to existing theories of cosmology. A new paper proposes that evolving dark matter - and not dark energy - could explain the same observations and provide an explanation that works better with existing theories.
Evolving Dark Energy or Evolving Dark Matter?
Abstract page for arXiv paper 2505.02645: Evolving Dark Energy or Evolving Dark Matter?
arXiv.org (arxiv.org)
