Ancient Human-Size Fish Breathed with Lungs

Before the dinosaur age, the coelacanth — a hefty, mysterious fish that now breathes with its gills — sported a well-developed lung, a new study finds. During the Mesozoic era, more commonly known as the dinosaur age, it's likely that some species of coelacanth (see-leh-kanth) moved to deeper waters, stopped using their lungs and began relying exclusively on their gills to breathe, the researchers said. This adaptation to deep water likely helped coelacanths survive the asteroid that