ScienceDaily: When President Barack Obama visited the shrinking Exit Glacier in September, he pointed to a very obvious sign of our warming planet literally at his feet. Less visible, but perhaps more indelible, signs of changing climate lie in the oceans. A University of Washington researcher argues in the journal Science that people -- including the world leaders who will gather later this month in Paris for the latest round of climate change negotiations -- should pay more attention to how climate change's...