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Hints of twisted light offer clues to dark energy’s nature

Cosmologists suggest that an exotic substance called quintessence could be accelerating the Universe’s expansion — but the evidence is still tentative.
  1. Davide Castelvecchi
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Cosmologists say that they have uncovered hints of an intriguing twisting in the way that ancient light moves across the Universe, which could offer clues about the nature of dark energy — the mysterious force that seems to be pushing the cosmos to expand ever-faster.

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Nature 588, 21 (2020)

doi: https://doi.org/10.1038/d41586-020-03201-8

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