I want to know the answer to the following question:
What may one-third of the indigenous Americans ancestry be traced back to?
All the background I'm provided with is that "A 2013 study in Nature reported that DNA found in the 24,000-year-old remains of a young boy from the archaeological Mal'ta-Buret' culture suggest that up to one-third of the indigenous Americans may have ancestry that can be traced back to western Eurasians, who may have "had a more north-easterly distribution 24,000 years ago than commonly thought".". Is that enough to answer the question?