4 ms·We used to joke in grad school that PNAS stands for Paper Not Accepted in Science.by benrapscallion 6y agoWe used to joke in grad school that PNAS stands for Paper Not Accepted in Science.scoot_718 6y agoYeah they're a real P-NAS.epmaybe 6y agoWe used to joke it was Probably Not Actual Sciencemnky9800n 6y agowhen you get to pick your own reviewers like they academy members do it might as well just be an opinion column. lol.