 In the real world, you can usually rely on your stuff not disappearing. But if you run a blog or a website, this happens all the time. We make links to other websites, but there's no guarantee that those links will always work. When a link goes away, it almost never comes back. It's called link rot. And all it takes is a few dead links to undermine your entire site. Some developers at the Berkman Center for Internet and Society at Harvard thought that kind of sucked. They created a simple open-source tool for blogs and websites to keep all links alive. It's called AMBER. With AMBER installed on your blog or website, every time you link, you preserve a snapshot of that webpage. So if someone visits a link on your website, even if the page you're linking to is gone, a snapshot of that page is still there, preserved for the ages. AMBER is free, and it takes less than 30 seconds to install on your blog or website. It won't help you get your sandwich back. But it will keep your links alive. AMBER. Keep your links alive. Visit amberlink.org to find out more.