title: How to improve the structure of URLs
body: <p>From the <a href="http://www.google.com/support/webmasters/bin/answer.py?answer=76329" rel="nofollow">article</a> at google's webmaster center and SEO's pdf, I think I should improve my website's URLs structure.</p>
  
  <p>Now the news url looks like "<strong><em>news.php?id=127591</em></strong>". I need to rewrite it to something like "<strong><em>/news/127591/this-is-article-subject</em></strong>"</p>
  
  <p>The problem is if I change the structure of url to the new one. Can I still keep the old one working? If both url working, how to avoid search engine like google and bing to search twice times for one article?</p>
  
  <p>Thanks!</p>