WELLINGTON, New Zealand--The southern winter that just ended in New Zealand was the warmest ever recorded, and scientists say that climate change is driving temperatures ever higher. For the three months through August, the average temperature was 9.8 Celsius( 50 Fahrenheit), according to New Zealand's National Institute of Water and Atmospheric Research. That's 1.3C above the long-term average and 0.2C higher than the previous record posted last year.... Scientists have been keeping records si