NEW YORK (GenomeWeb) – In a pair of papers appearing online today in the American Journal of Human Genetics, independent research teams provided analytical evidence suggesting Neanderthal admixture with human populations outside of Africa was more complicated than previously realized.

"One explanation that could've been tidy and fit everything? It turns out it doesn't fit all of the parts of the data," University of California at Los Angeles researcher Kirk Lohmueller told GenomeWeb. "So we're left with there needing to be a more complex explanation."

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