SUMMARY: With all this talk of global warming, it may come as a surprise that Antarctica has actually been mostly getting colder over the last 30 years. But new research from NASA indicates that this trend is about to reverse, and the continent will warm over the next 50 years. Researchers found, ironically, that low ozone levels actually made the continent colder, but with restrictions on ozone-destroying chemicals around the planet, this cooling effect is going to go away as the ozone layer returns. If temperatures rise too high, the continent's ice sheets will melt and slide into the ocean, raising water levels around the world.

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