In a new paper published this month in the journal Diversity, paleontologists described the fossilized skeletons of the dolphin genus Xenorophus from the Oligocene of South Carolina, the United States. Xenorophus hunting sea turtles. Image credit: Robert Boessenecker. Whales and dolphins, which lack external ears, rely on echolocation to navigate and hunt in the dark. Much like shouting and listening for echoes, these animals emit high-pitched sounds...
