[Cd00d]

Interesting. As a physicist, I tend to put extra trust in PNAS credibility due to their history of critical editors and reviewers, and therefore am less likely to question results published there. Maybe it's the same fallacy, but at the same time we can't all be experts at everything and have to defer to trust at some point. Anyway, thanks for the contextual tidbit.

[Obi_Juan_Kenobi]

PNAS is notorious for inconsistent quality, and has recently had to modify their direct submission process, partly as a result. I don't know about physics, but I've seen them publish a lot of very poor work.