Whale song

I love whale song. Sometimes I listen to it as I drift off to sleep, imagining myself in a watery womb of near silence, where the only sounds are primeval vibrations and it is neither dark nor light, my cool blue cocoon gently rocking on the waves. Anyway, this story is about whales previously thought extinct that create new songs each year and sing in two tones combined, like Tuvan throat singing. Neat.