GSDMC Variant Turned Wild Horses into Rideable Partners, Reshaping Civilizations

Ancient DNA analysis shows that a specific GSDMC gene variant swept through horses around 4,200 years ago, reshaping their skeletons and limb strength to enable riding. Earlier, a ZFPM1 variant may have calmed temperament about 5,000 years ago, aiding domestication. The rapid rise of the GSDMC allele across Eurasia turned mounted riding into a dominant driver of warfare and transport, helping spark empires and drastically altering human history.