Thanks, you provoked me to look it up in more detail, and we're both oversimplifying, and it's even wilder than I thought. From [0]: >> On an organismal level

Thanks, you provoked me to look it up in more detail, and we're both oversimplifying, and it's even wilder than I thought. From [0]: >> On an organismal level, they are completely frozen to death — their heart stops beating and breathing ceases. Image via Facebook >> The frog’s death-defying trick actually comes down to one simple factor: nucleating proteins. When the frog’s skin begins to freeze, these proteins cause the water within the frog’s blood to freeze first, which in turn serves as a vacuum for most of the water out of the cells. Simultaneously, their bodies pump out large amounts of glucose to serve as stuffing material, which prevents the cells from collapsing. >> Essentially, frogs fill their bodies full of sugar to keep themselves alive through winter. When warm temperatures melt the snow around their hibernacula, frogs slowly thaw back to life. Water melts and returns to the bloodstream, begins circulating, and restarts their heart and breathing. Within an hour or so the frog returns to normal life, completely unscathed. Just wild! [0] https://roaring.earth/frogs-literally-freeze-during-winter-and-thaw-back-to-life-in-spring/ https://roaring.earth/frogs-literally-freeze-during-winter-a...