How-Old.net is a web app that will guess your age from photo, and it is by none other than Microsoft. It is more of a fun way for Microsoft to experiment with its facial recognition technology. The app can detect your pet dog from a human, but it can’t differentiate a CGI alien from us (is there really a human being with blue skin tone?). Judging by the few photos we tested, the result is often far from accurate. Safe to say that SkyNet or the rise of the machines is not happening soon if state of the art technology is in used.