ScienceDaily: The vast majority of the world’s glaciers are retreating as the planet gets warmer. But a few, including ones south of the equator, in South America and New Zealand, are inching forward. A new study in the journal Science puts this enigma in perspective; for the last 7,000 years New Zealand’s largest glaciers have often moved out of step with glaciers in the northern hemisphere, pointing to strong regional variations in climate. Conventional wisdom holds that climate during the …