Posted by: jamie (116 posts)
February 25, 200711:48 PM

These bears seem to be the poster animals for a warming climate. These big critters can swim 200 miles in a day if they've strayed too far from the mainland. Graceful and resilient, they are the biggest of what scientists call a determinate species, that is, other life forms that could determine our future. Generally frogs, birds and plants are in this catagory.