Reminds me of an article that was on HN a while ago, about how prehistoric people used to smear ochre on dead bodies using rocks, and then break these rocks to

Reminds me of an article that was on HN a while ago, about how prehistoric people used to smear ochre on dead bodies using rocks, and then break these rocks to dispel the spirits of the dead (or something along those lines..), all this inferred from some broken rocks with traces of ochre on them.