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GeoGeoGeoGeo OP t1_jed896h wrote on March 31, 2023 at 4:02 AM

Reply to comment by jjmc123a in Horses came to American West by early 1600s, study finds by GeoGeoGeoGeo

Horses are one of the multitude of North American megafauna that disappeared during the Pleistocene extinction event. There are no volcanic events that are believed to have directly caused the extinction of horses or other large mammals.