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A number of high-energy anomalies raised hopes that astrophysicists had seen their first direct glimpses of dark matter. New studies suggest a different source may be responsible.
The first major results from the Dark Energy Survey signal the start of a new era of cosmology.
The newly developed theory of emergent gravity, proposed as an alternative to dark matter, struggles in one of its first trials.
Does the force of gravity change at large scales? Perhaps not, but a new theory of dark matter shows why that could appear to be the case.
A different kind of dark matter could help to resolve an old celestial conundrum.
Elena Aprile now leads the world’s most sensitive dark-matter search. But before she could build her first detector, she had to make herself out of titanium.
A proposed theory of gravity does away with dark matter, even as new astrophysical findings challenge the need for galaxies full of the invisible mystery particles.
A camera lens often used by wildlife and sports photographers has helped astronomers learn about dark matter and galaxy formation.
The surprising discovery of a massive, Milky Way–size galaxy that is made of 99.99 percent dark matter has astronomers dreaming up new ideas about how galaxies form.