Emigrants from Siberia that walked across the Bering land bridge into North America may have had dogs in their company, and one writer suggests that the use of sled dogs may have been critical to the success of the waves that entered North America roughly 12,000 years ago, although the earliest archaeological evidence of dog-like canids in North America dates from about 9,400 years ago.:104 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. COUNT 7
QSN1 What type of working dog may have been the reason so many humans were able to get into North America 12,000 tears ago? ANS1 sled dogs QSN2 What did ancient people walk across from Siberia into North America? ANS2 Bering land bridge QSN3 How old are the oldest findings of dogs in North America? ANS3 9,400 years QSN4 Evidence places dogs in North America when? ANS4 12,000 years ago QSN5 Dogs were the only domesticated animals for what North American population? ANS5 Athabascan QSN6 Dogs contributed to what migration 1400 years ago? ANS6 Apache and Navajo tribes QSN7 People still used dogs as pack animals even after what other animal began being used for this purpose? ANS7 horse