Earth's poles in peril
Scientists are paying increased attention to changes in Earth's polar regions, which are in danger because of global warming.
By Emily Sohn, 00:00 AM May 25, 2007
The North and South poles are remote and frigid places that receive lots of animal visitors but few human tourists.
The polar bear is one of the few species to visit the North Pole.
But even if you never plan to visit the polar bears in the north or penguins in the south, now is a perfect time to start thinking about them. That's because 2007 marks the beginning of the International Polar Year (IPY), a two-year-long bonanza of science projects that aim to illustrate ho...
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