A finding that is accurately summarized as “some ancient South Americans show a faint statistical signal of genetic affinity to Australasian populations, which researchers interpret as reflecting deep ancestral structure in the founding population” has different practical implications than a finding that is summarized as “ancient Brazilians may have been part-Australian, suggesting that the ancestry of South American Indigenous people is more complex than previously thought.” The second framing, which appears in some popular accounts of the science, can be read as implying that the Native American identity and land claims of contemporary Indigenous Brazilians are somehow qualified or contested by the genetic findings — an implication that is not supported by any scientific evidence.

The scientific community’s responsibility in this regard is clear: to communicate findings accurately, to correct misrepresentations when they appear, and to engage with Indigenous communities in ways that center those communities’ interests rather than treating them as passive subjects of research.

Some researchers working in this area are doing this well.

The standard is worth articulating clearly, even knowing that it is not always met.

The Ongoing Excavation at Lagoa Santa