Weakly Interacting Massive Particles or WIMPs are hypothetical dark matter particles that supposedly make up 26-27% of the universe. They are only detectable through their gravitational effects.

In a recent ScienceNews article LUX-ZEPLIN researchers monitoring 10 metric tons of liquid xenon almost a mile below the surface in Lead, South Dakota have reduced the cross-sectional area that WIMPs can interact with normal matter by about 80%.

This reduced area of interaction implies that the particles are even weaker than previously thought. This would make them even harder to detect.  

Triva time: A cube that could hold 10 metric tons of xenon would need to be about 1.5 meters on a side.

Source: The Possibilities for Dark Matter…by Emily Conover, 2024, Science News. Graphic: WIMPs by University of California Berkley, 2013.