If you ever dreamed of doing a little science — maybe classifying some Martian craters — but didn’t think you had the necessary skills, NASA has a program for you. And it just might save you and other U.S. taxpayers a buck or two. An interactive online project called Clickworkers lets volunteers study decades-old pictures of Mars from the Viking spacecraft and pick out some of the thousands of craters that need classifying. It’s the kind of tedium that most scientists might like to rise above. NASA bills the project as an experiment “to see if public volunteers, each working for a few minutes here and there, can do some routine science analysis.”