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The hominid primate species Orrorin tugenensis roamed the Earth approximately 6 million years ago, discovered by anthropologist Meave Leakey and her team in 2000 at Tugen Hills, Kenya. Orrorin tugenensis, with its relatively small canine teeth and human-like upper dental arch, has sparked significant interest among paleoanthropologists, as it provides valuable insight into the evolutionary lineage leading to hominins.