'Dark Matter Fossils" in ancient rocks may record millions of years worth of ultra-rare dark matter interactions. Though the tell-tale imprints left behind by such interactions are 100,000 times narrower than a human hair, researchers say technology is finally at the point where it can detect them.

See the source article by following the link below:
'Dark Matter Fossils" in ancient rocks may record millions of years worth of ultra-rare dark matter interactions. Though the tell-tale imprints left behind by such interactions are 100,000 times narrower than a human hair, researchers say technology is finally at the point where it can detect them.