On Our Radar: A Shrunken Ozone Hole Warmer air temperatures high above the Antarctic have resulted in the second-smallest seasonal ozone hole in 20 years, NOAA reports. The hole began making a yearly appearance in the early 1980's as a result of the release of manmade chemicals called chlorofluorocarbons or CFCs. NOAA also refines its forecast of the probable path of Hurricane Sandy along the East Coast in coming days amid indications that it will have quite a high impact. The Washington Post Elevated levels of cesium detected in fish off the Japanese coast suggest that radioactive particles from the Fukushima Daiichi disaster could contaminate sea life for decades, researchers report. After edging toward the brink of extinction, with only 10 to 25 individuals left in the wild, the striking Grand Cayman blue iguana is doing better. The population is up to around 750, compared with only 10 to 25 a decade ago.