I've been following a site that ranked number one for a keyword, then it suddenly disappeared from the rankings for a week or two. Then today, I notice a new site in the top 5 for this keyword, or so I thought. I clicked on the site and it looked exactly like the site that used to rank number one, but the URL was different. So I typed in the URL of the old, #1 site and it re-directed to this site. What I want to know is, how was this site owner able to redirect the old site to the new one without it bouncing back in SERPs in a week or two? I also noticed the AdSense was removed from the old site a few weeks before it disappeared from the first page, now it's back on the new, re-directed site. I assumed the site owner lost his/her AdSense account? Could that be the reason for the whole re-directing business?