Never has this been the case more than with dark matter. Though it's far more abundant than the matter we can see and feel, dark matter as we know it is virtually immune to observation ...

Much remains unknown, such as the true nature of the dark matter that dominates gravity inside galaxies and the dark energy that drives the universe’s accelerating expansion. Yet even for these ...

Dark energy and dark matter refers to the unseen energy and matter components of the Universe. Dark matter is invisible, non-baryonic matter hypothesized to explain phenomena including ...

Besides particles like sterile neutrinos, axions and weakly interacting massive particles (WIMPs), a leading candidate for the cold dark matter of the universe are primordial black holes—black ...

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Edited by Joshua Combes, University of Colorado, Boulder, CO; received September 9, 2023; accepted February 10, 2024, by Editorial Board Member Bernard F. Schutz ...