With photos, to quote an old Pontiac ad, wider is better. The influential Boston Globe photoblog the Big Picture has been proving that since 2008 by running news images from sources like the AP at a width of 990 pixels — by Web standards, practically the equivalent of Imax. Whether the pictures in question depict epic destruction, national celebration or dogs in the news, you learn things from them that you wouldn't if they were displayed in typical itty-bitty dimensions. The blog is now available in app form for the iPhone and iPad, where the pictures are less expansive but still eye-opening.