Are magazines (journals) "Scientific American" and "Popular Science" peer reviewed? Wikipedia says that New Scientist publishes articles which are not peer-reviewed.

But I found no information about "Scientific American" (SciAm) and "Popular Science" (PopSci).
From the Scientific American website:

Generally speaking, SCIENTIFIC AMERICAN presents ideas that have already been published in the peer-reviewed technical literature. We do not publish new theories or results of original research.
Please allow six to eight weeks for the review process.

From this and other submission instructions on that page I conclude that the manuscripts undergo a general review that is probably aimed at accuracy and style, which is different than typical scientific peer-review of original research.
No scientific peer-review is mentioned in the relevant page on the Popular Science website either.