"Dialects" is one of those words tossed around a lot when talking about human language. They indicate where a speaker is from. But dialects aren't exclusive to humans; scientists have known for a while that whales and songbirds also show these variations in language. Today, NPR science correspondent Nell Greenfieldboyce explains research that expands that list to include naked mole rats.Yearning for more episodes about communication between animals? Or wish we would cover something else entirely? We'd love to hear your suggestions — shortwave@npr.org.