In 1923 there were no such things as time machines. Technology has advanced quite a bit since then, but there are still no time machines. There are, however, cell phones and people with vast imaginations and clearly some dreamers with too much time on their hands. That's the most likely explanation behind Irish filmmaker George Clarke's claim that he found a woman talking on a cell phone in a Charlie Chaplin movie. Or rather not in the film itself, but in the bonus footage included on a new DVD version of The Circus. Filmed outside the movie's 1928 Hollywood premiere, a woman walks from right to left, holding what appears to be a cell phone, chatting as she strolls. When Clarke uploaded the footage in October, the Web erupted in a flurry of time-travel intrigue (the video has been watched more than 5 million times since), as viewers struggled to come up with alternatives as to what the woman was doing, and with what object. Our thoughts: she was probably carrying an early version of a hearing aid called a carbon amplifier, which Siemens Corp. patented around that time.