According to a statement released by the University of Tübingen, an international team of researchers who evaluated a fossil femur unearthed at the site of Azmaka in southern Bulgaria suggests that it could belong to a human ancestor. “At 7.2 million years old, this ancestor, which we classify as belonging to the genus Graecopithecus, could be the oldest known human,” said paleoanthropologist David Begun of the University of Toronto. Graecopithecus was first identified by a fragment of a lower jaw unearthed near Athens. The researchers examined the shape of the tooth roots from the jaw and concluded that Graecopithecus could...