Penguins are deep divers that can hold their breath for up to 30 minutes, giving them time to hunt for dinner. This ability is thanks, in part, to their distinctive hemoglobin, the body’s oxygen courier that travels via the bloodstream. Nebraska biologists uncovered hemoglobin’s evolutionary trick that turned penguins into underwater specialists. Jay Storz, Willa… Continue reading Penguin Hemoglobin Evolved to Meet Oxygen Demands
