http://www.sciencemag.org/news/2021/01/ice-age-siberian-hunters-may-have-domesticated-dogs-23000-years-ago

An artist’s conception of a Native American and a dog in ancient America

Sometime toward the end of the last ice age, a group of humans armed with stone-tipped spears stalked their prey in the bitter cold of northeastern Siberia, tracking bison and woolly mammoths across a vast, grassy landscape. Beside them ran wolflike creatures, more docile than their ancestors and remarkably willing to help their primate companions hunt down prey and drag it back to camp. These were the world’s first dogs. Their descendants flowed both west and east, populating Eurasia as well as accompanying the ancestors of Native Americans as they spread into the Americas.