Eric Walker added Our Earliest Ancestors - YouTube to a number of topics

Eric Walker added Orrorin - Wikipedia to Orrorin tugenensis

Eric Walker added Our Earliest Ancestors - YouTube and Orrorin - Wikipedia to Orrorin tugenensis, and added Orrorin tugenensis to Orrorin

Eric Walker added Orrorin tugenensis to Orrorin, and added Orrorin to Hominins