There has been much debate and hypothesizing about the origins of domestication in horses (Equus caballus). Where were they first domesticated, and by whom? How did they spread around the globe and what were their ancestors like? Many previous studies have attempted to answer these questions but no final resolution has been forthcoming, and the early domestication of the horse has remained exceedingly difficult to trace in the archeological record.  In a new study led by Professor Ludovic Orlando of CNRS, a team of 162 international scientists...