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Scientists are using DNA from a 9,000 year old mummy found in Alaska along with the DNA of ancient Brazilians in order to theorize how humans migrated from Asia down to South America. Researchers have found that migration occurred from North America to South America in three major waves. By using DNA analysis, researchers have been able to find similarities in human remains found in North and South America. After finding similarities, scientists are able to see which groups from North America populated South America due to their similar genetics. This study is important because it shows that there were many levels of genetic diversity in the Americas, due to the different waves of migration. Analyzing ancient DNA discovered in  10,000 year old remains that Amazonians and indigenous Australians share DNA. Finding Australian DNA has raised many questions about how people crossed from Australia over the Pacific to reach the Americas. It is theorized that the ancestors of the two groups once lived in Asia and migrated to Australia and North America separately.

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