""We are aware of conflicting conclusions published as an interview in the popular National Geographic magazine. Despite an intensive search we cannot find them reproduced in the mainstream scientific literature. We consider that data somewhat flawed, and furthermore, unsound. National Geographic is not a peer-reviewed academic journal and thus the weight of the evidence is poor compared to other peer-reviewed academic journals that are also in the public domain. One cannot be comfortable with data that have not passed the scrutiny of peer review..."