In the newest ad ("Watered Down"), we see that when the user touches an image on the web page, Safari zooms in on that image. This part I get; the browser can presumably pick up on the dimensions of the image and scale it accordingly... ... but then in the next shot, the user touches one of the articles on the page and Safari appears to zoom in on that article. How does it "know" how far to zoom? I'm looking at the HTML source for the NY Times home page and it doesn't appear that the individual stories are in their own DIVs, or any other structure that the browser could isolate on the page. Or is it just magic?