 An effort to determine the Majorana/Dirac nature of the neutrino, called CUORE (Cryogenic Underground Observatory for Rare Events), is operating in the laboratory (as of 2018).The detector is shielded with lead recovered from an ancient Roman shipwreck, due to the ancient lead's lower radioactivity than recently minted lead.The artifacts were given to CUORE from the National Archaeological Museum in Cagliari.