CNN: Elephant seals equipped with electronic tags and robotic mini submarines using sonar were just two projects during the International Polar Year (IPY) that aimed to investigate the effects of global warming in polar regions. We think he’s trying to communicate: An elephant seal with a custom designed tag. The tags fell off when the animals molted. The fourth IPY, which began in March 2007 and actually covered two full years, ended last month, after 160 scientific projects were …