After implanting decades-old frozen rat tissue into mice and comparing it with tissue just a few months old, the researchers discovered that the older tissue could resume sperm production even after being frozen for so long. | IFLScience

In histopathology, cutting of frozen sections is a rapid tissue processing technique mainly used for intraoperative diagnosis (to guide surgeons during surgery). Instead of the usual paraffin embedding (which takes hours to days), the frozen section method allows diagnosis within minutes. Here’s a breakdown: --- Principle Fresh tissue is rapidly frozen to preserve its structure. The frozen tissue becomes firm enough to be cut into very thin sections using a special microtome (cryostat). Sections