Well, I have to say that the best photographs of Tuesday’s big snowstorm in the Northeast have to be the images taken by the robot eyes of the American Eagle Foundations webcam at the National Arboretum. Here the mating pair of American Bald Eagles, “Mr. President” and “First Lady” go to extremes to protect their eggs from the late spring assault on their nest by Old Man Winter and Mother Nature. The morale, of course, is one of parental love and dedication, or, if you wish, of the intense instinctual need to extend and propagate your DNA.Whatever we may think of the maternal instincts of the raptor, as in welcome to Jurassic Park, here we have, in the extreme, the instinctual engine that drives biological evolution.