Polar Worms May Warn of Global Warming, Experts Say

(A story from National Geographic News. We hope you enjoy it.)
In the McMurdo Dry Valleys of Antarctica, worms are the most sophisticated life-forms around.
The valleys are so cold, arid and bleak that they are used to simulate conditions on Mars. No plants, birds or insects survive there. But beneath the rocky, frozen polar soil dwell microscopic worms called nematodes that may be harbingers of the effects of climate change throughout the world. ................
LINK: http://news.nationalgeographic.com/news/2003/09/0912_030912_tvmcmurdo.html