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In 1887, Eugene Dubois began his search in Sumatra for the "missing link"-the being that would fill the evolutionary gap between ape and man. He discovered a fossilized human-like thighbone and a section of skull. He confirmed that these fossils were of significant age, based on other fossils in the same area. The thighbone`s shape indicated that it belonged to a creature that walked upright. Dubois estimated the size of the creature`s skull from the skull fragment and concluded that this creature`s brain volume was between that of the higher primates and that of current humans. Although the concept of "missing link" has changed dramatically and a recent dating showed Dubois`s fossils to be far too recent for humans to have evolved from this "missing link," the value of his discovery and the debate it generated is unquestionable.