I admit I wasn't looking for beavers during the 2 years I spent in the Big Apple working in the F&S; editorial office. Just the same, I never saw one and hardly expected to. After all, the toothy rodents that appear on the city's official seal had not been spied in the actual city by anyone in 200 years. That is, until a biologist videotaped one swimming up the Bronx River last Wednesday. Check out the full story and watch the video here.