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RES-NOVA is a neutrino observatory plan, designed to detect supernova neutrinos. Its mechanism would be sensing Coherent Elastic Neutrino-Nucleus Scattering (CEvNS), in small but very dense crystal scintillators, the high density increasing the probability of interactions. The crystals would be just a few centimeters across, formed of PbWO4 (lead-tungsten-oxide), specifically manufactured using archaeological lead. The latter is lead smelted over a thousand years ago: it will have lost virtually all of its radioactivity, reducing noise, yielding much higher sensitivity. They would be sensitive to all neutrino flavors. In addition, the experiment's extreme sensitivity means it might detect WIMPs, so it serves also as a dark matter experiment. The full plan would eventually deploy such sensors at a number of locations, which could offer the confirmation of simultaneous detections at different locations, and offer some directional information on the source.