The recent discovery of small hominid fossils prompted an article about human evolution that discusses the competing theories of how we evolved. One, which the author terms "March-of-Progress", fits nicely with the much parodied picture by the same name. However, a more modern theory suggests that "a number of different species seemed to have lived side by side" which seems to fit the given evidence better.
UPDATE: PZ Myers has lots of pictures of the fossils in question, as well as other Homo erectus specimens.