A mysterious gamma-ray stream comes from the Milky Way’s center. Could dark matter have something to do with it?

June 21, 2026

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New research has failed to rule out self-annihilating dark matter as the source of a hotly debated gamma-ray emission known as the Galactic Center Excess radiating from the heart of the Milky Way.

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June 21, ca. 2500 BCE: Summering at Stonehenge