They’re found in forests spanning New England, the Appalachians, Canada, and Alaska, and they’re the only frogs that live north of the Arctic Circle. Now, researchers are exploring how drastic temperature swings brought on by climate change might affect the wood frog’s weird winter tradition. Read more: “The Animals That Exist Between Life and Death”ANTIFREEZE FISH: See-through Antarctic icefish don’t mind spending their time in frigid waters. These tough fish also have relatively thin blood that can keep on flowing in the cold because they don’t produce hemoglobin or red blood cells. They can survive temperatures as low as negative 328 degrees Fahrenheit and as high as more than 300 degrees.