Nearly two decades ago, Dr. Fred Sharpe, an expert in humpback whales and the Principal Investigator with the Alaska Whale Foundation, received an unexpected phone call. It was Dr. Laurance Doyle, an astrophysicist specializing in alien intelligence at Search for Extraterrestrial Intelligence (SETI) Institute, calling with a big idea: What if studying humpback whale song could reveal something about the way aliens might be trying to communicate with humans? Today Drs. Sharpe and Doyle are investigating humpback whales’ complex, long-distance communication with the aim of learning about how alien intelligences if they exist, might attempt to transmit their messages through the cosmos. Learning to understand the language, or the song, of the whales, might someday lead us to understand the language of the extraterrestrial intelligence — communication that comes to us through the cosmos, which might even lead to a better understanding of ourselves.