Photosynthesizing algae injected into the blood vessels of tadpoles supply oxygen to their brains

Leading a double life in water and on land, frogs have many breathing techniques -- through the gills, lungs, and skin -- over the course of their lifetime. Now scientists have developed another method that allows tadpoles to 'breathe' by introducing algae into their bloodstream to supply oxygen. The method provided enough oxygen to effectively rescue neurons in the brains of oxygen-deprived tadpoles.