Dogs also carried much

Domestic dogs inherited complex behaviors from their wolf ancestors, which would have been pack hunters with complex body language. These sophisticated forms of social cognition and communication may account for their trainability, playfulness, and ability to fit into human households and social situations, and these attributes have given dogs a relationship with humans that has enabled them to become one of the most successful species on the planet today.[23]
Although experts largely disagree over the details of dog domestication, it is agreed that human interaction played a significant role in shaping the subspecies.[28] Domestication may have occurred initially in separate areas, particularly Siberia and Europe. Currently it is thought domestication of our current lineage of dog occurred sometime as early as 15,000 years ago and arguably as late as 8500 years ago. Shortly after the latest domestication, dogs became ubiquitous in human populations, and spread throughout the world.
Emigrants from Siberia likely crossed the Bering Strait with dogs in their company, and some experts[29] suggest the use of sled dogs may have been critical to the success of the waves that entered North America roughly 12,000 years ago,[29] although the earliest archaeological evidence of dog-like canids in North America dates from about 9,400 years ago.[30][31] Dogs were an important part of life for the Athabascan population in North America, and were their only domesticated animal. Dogs also carried much of the load in the migration of the Apache and Navajo tribes 1,400 years ago. Use of dogs as pack animals in these cultures often persisted after the introduction of the horse to North America.[32][page needed]
The current consensus among biologists and archaeologists is that the dating of first domestication is indeterminate,[28][32] although more recent evidence shows isolated domestication events as early as 33,000 years ago.[33][34] There is conclusive evidence the present lineage of dogs genetically diverged from their wolf ancestors at least 15,000 years ago,[35][36][37][38][39] but some believe domestication to have occurred earlier.[28] Evidence is accruing that there were previous domestication events, but that those lineages died out