You should thoroughly investigate each website you consider using to ensure that it was written by a credible author or organization and features current information. The design of a website and its URL can provide answers to these questions. Blogs or pages published through membership sites such as Tripod or Blogger are most likely personal home pages and should be treated with caution. However, URL extensions such as .gov and .edu reference government and educational affiliated sources, which usually provide verifiable information. Broken links and old dates on the site's content can also be indicators of a site that hasn't been maintained.