and others. This mingling is thought to have had a substantial impact on human history and variation over time. That said, scientists have previously hypothesized that this sort of admixture would’ve been actively selected against through the processes of natural selection. The offspring of such pairings would be less suited for survival. But the passage of time and disappearance of all other hominins have made this hypothesis particularly difficult to test..
Taking this comparative approach, one team of researchers analyzed the interbreeding practices of baboons in the wild. As a whole, their analysis indicated that interspecies breeding is actively selected against in baboon populations, supporting the hypothesis that hominin hybrids lacked the same fitness for survival as their non-hybrid peers. More importantly, the researchers say, their analysis also accentuates the value of other primates as proxies for retrieving inaccessible human history.
Though the field observations indicated that the offspring of this breeding are no less suited for survival, their genomic analysis seemingly suggested the opposite. It showed that the breeding was selected against in a way similar to the hypothesis about intermingling between humans and other hominins.
Ultimately, these findings could help scientists study human variation and history. But the researchers say that the specifics of the selection against hominin hybridization, including its mode and its mechanics, are still murky and should be subject to additional studies.
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