Dark matter in a mine? It’s called coal, ya dummies.
But seriously, that’s pretty damn cool. I didn’t think there would be dark matter here on this planet. I’ve always read about it as this ineffable material that permeated and shaped the distant cosmos and could only be identified by inference based on how the universe managed to arrange itself in strange ways that could not be accounted for without the existence of some other force. It’s rather fascinating to see that they may be able to find it here on our very own planet, and thus understand better the nature of the universe. Pity there’s such a huge margin for error here, but I suppose we’ll find out better in a few months.