Frozen human brain tissue can now be revived without damage. Note that it's not a whole brain. Still very interesting. https://www.cell.com/cell-reports-methods/fulltext/S2667-2375(24)00121-8?_returnURL=https%3A%2F%2Flinkinghub.elsevier.com%2Fretrieve%2Fpii%2FS2667237524001218%3Fshowall%3Dtrue