Scientists have discovered that some decapitated sea slugs can regrow hearts and whole new bodies, the CBC reports. Biology researcher Sayaka Mitoh and Nara Women’s University aquatic ecology professor Yoichi Yusa cut off the heads of 16 sea slugs. Six started regeneration and three survived. One lost and re-grew its body twice.
https://www.cbc.ca/news/technology/sea-slug-regeneration-1.5942055