, this is mark's old page filled with scrapbook-like entries in no order of importance, like: "andy samberg plays me on saturday night live." you have to dig around to get any real sense of who mark is as a person. this is mark's new page, which is, in effect, the mark zuckerberg story, or how he wants his friends to see him. his bio information is right up top, with the kind of details he'd tell you if you met him, say, at a bar. >> i work at facebook, and i spend all of my time there, right? i mean, here are my friends. um, i grew up in new york, and now i live in california, right? those are really kind of basic, important things. >> under the bio: his latest photos, posted by him or his friends. it's like a running ticker tape of his life. every day, a staggering 100 million photos are uploaded onto the site. lots of photos on the-- right away. >> people love photos. >> yeah. >> photos originally weren't that big of a part of the idea for facebook, but we just found that people really liked them, so we built out this functionality. >> a dozen engineers and designers worked on the new pa