 A new analysis in 2018 involved genomic sequencing of ancient DNA from mid-fourth-millennium B.C.E.Botai domestic horses, as well as domestic horses from more recent archaeological sites, and comparison of these genomes with those of modern domestic and Przewalski's horses.The study revealed that Przewalski's horses not only belong to the same genetic lineage as those from the Botai culture, but may be the feral descendants of these ancient domestic animals, rather than representing a surviving population of never-domesticated horses, but having been domesticated for a relatively short time (and having become feral soon after) the Przewalski's horse retained more wild or primitive traits than did other horses.