Here's something. Go to Google and type in "elgoog". Click the first link in the results. You can now search any subject you like, as long as it is entered backwards. eg. sgniR eht fo droL. This is a great tool if you live in China, as the government restricts access to subversive sites such as BBC News. The (literal) Google mirror circumvents this censorship completely. Have a look in New Scientist for the details.