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New Study Links Dark Matter to Early Universe Heat

1/18/2026

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Summary

Story summary

Researchers from the University of Minnesota Twin Cities and Université Paris-Saclay propose dark matter originated as 'incredibly hot' moving near the speed of light.
The study, published in Physical Review Letters, reexamines dark matter formation during the post-inflationary reheating phase.
They argue dark matter particles can cool down sufficiently before galaxies form.
The researchers plan to explore detection methods for these particles to illuminate insights about the early Universe.

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Story summary

Researchers from the University of Minnesota Twin Cities and Université Paris-Saclay propose dark matter originated as 'incredibly hot' moving near the speed of light.
The study, published in Physical Review Letters, reexamines dark matter formation during the post-inflationary reheating phase.
They argue dark matter particles can cool down sufficiently before galaxies form.
The researchers plan to explore detection methods for these particles to illuminate insights about the early Universe.