Scientists captured female sperm whales on video working together during a birth to protect the calf  CTV NewsDescription of a collaborative sperm whale birth and shifts in coda vocal styles during key events | Scientific Reports  NatureScientists film whale giving birth while other whales work together to help her  The GuardianOut at sea, a Canadian whale scientist witnessed something close to a miracle  The Globe and MailScientists Filmed a Whale Birth. The Surprise: Mom Had Many Helpers.  nytimes.com