The formation of cosmic structure, on both large scales and small scales, is highly dependent on how dark matter and normal matter interact, as well as the initial density fluctuations that have their ...

A strange, starless cloud on the edge of a nearby galaxy is forcing astronomers to confront one of the biggest unknowns in ...

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Scientists have now mapped the forces acting inside a proton, showing in unprecedented detail how quarks -- the tiny particles within -- respond when hit by high-energy photons. The international team ...