Play Kids' Bop!

A new study in nature communications has collected vocal recordings from 53 species of turtles and other animals that were otherwise considered to be mute. The last common ancestor of all lung, fish, and tetrapods started vocalizing more than 400 million years ago. That's at least 100 million years earlier than previous studies had suggested. Animals typically produce sounds for many reasons, to define territory, to attract a mate or to communicate with their young ones.