Scientists may have finally found where the ‘missing half’ of the universe’s matter is hiding

Live Science

By Joanna Thompson published April 17, 2025

The universe’s missing matter may have finally been found.

Astronomers think regular matter — that is, the stuff that isn’t dark matter — makes up about 15% of the universe’s total mass. However, for years, researchers have run into a problem when trying to quantify it: They haven’t been able to find about half of that “normal” matter in the stars, galaxies and other space structures we can see.

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