There is a (waning?) hope that dark matter interacts weakly with ordinary matter, which would make it detectable: https://en.wikipedia.org/wiki/Weakly_interacti

There is a (waning?) hope that dark matter interacts weakly with ordinary matter, which would make it detectable: https://en.wikipedia.org/wiki/Weakly_interacting_massive_particles https://en.wikipedia.org/wiki/Weakly_interacting_massive_par...