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Scientists narrow the hunt for non-visible dark matter in the universe

One of the hottest pursuits in particle physics is the search for clues about dark matter, a theoretical material that does not emit light or energy and cannot be directly observed.

Spiral galaxy PGC 54493
Spiral galaxy PGC 54493, studied by astronomers for a phenomenon caused in part by dark matter (AN/ESA/NASA/Judy Schmidt)

GENEVA (AN) — This Halloween, scientists celebrate a cosmic riddle of mysterious material known as "dark matter" they believe makes up most of the universe and holds it all together. Along with pumpkin-carving and trick-or-treating, it's "Dark Matter Day" around the world.

Scientists, institutions and others gather at local events to talk about one of the hottest pursuits in particle physics: the hunt for dark matter, a theoretical material that does not emit light or energy and cannot be directly observed.

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