Final answer:
The DNA analysis of Kennewick Man reveals a close genetic relationship to Southeast Asian populations, challenging previous assumptions about human migration to the Americas.
Step-by-step explanation:
Recent analysis of the DNA of the Kennewick Man, an eight-thousand-year-old human remains found in Washington State, shows a close genetic relationship to Southeast Asian populations. This finding challenges previous assumptions about the migration of humans to the Americas and suggests that there is much we still don't fully understand about the process. The discovery of Kennewick Man's genetic links to Asian groups has prompted a reevaluation of migration theories about the earliest Americans.