Scientist Michelle Fournet and her colleagues from the University of New Hampshire hang out with humpback whales in Alaska, recording their daily communications - and then sending whale recordings back to the giant animals to see if and how they respond. Some of her latest findings could break new ground: she can identify individual whales by their sounds. Michelle tells us the moving story of how she morphed from broke actor to internationally-respected whale researcher - and how she hopes research on humpbacks' "language" can help humans protect them.