USE OF WEB BEACONS Our web pages may contain electronic images known as web beacons (sometimes called single-pixel GIFs) that allow us to count users who have visited those pages and to deliver co-branded services. Web beacons are not used to access your personally identifiable information on the Science Website; they are a technique we use to compile aggregated statistics about our Website usage. Web beacons collect only a limited set of information including a cookie number, time and date of a page view, and a description of the page on which the web beacon resides. 