Killer whale crisis: DDT disrupts hormones / Distraught whale pictured tragically pushing the dead body of its new born calf / Bereaved orca whale seen carrying second dead baby, say US researchers / Killer whale who carried dead calf in 'show of grief' gives birth again - but experts are concerned / Bag found in whale stranded in Hong Kong waters 'highly likely' to be cause of death / Killer whale pod develops unique technique to hunt world's largest fish / Unique killer whale pod may have acquired special skills to hunt whale sharks / Watch horror moment injured killer whale spurts blood as cruel aquarium show goes wrong in front of horrified families / RFK Jr. is being investigated for collecting dead whale / Beloved whale of Russian origins may have been shot dead, report animal rights groups