Neither “Scientific” or “American”
I can recall being introduced to big-bore rock tunneling, to create tunnels for people-carrying cars to rocket underground.
I can recall articles on polyominoes and what cool stuff they were.
I can recall all sorts of neat *scientific* articles.
Then, for a short while, they seemed to require one leftist article per month. I held my nose for a few months to read the still good stuff, but when the pattern was obvious (in the original Scientific American experimentation way), I left.
Maybe a year or two after that I checked SA, and found the 1-per-month to then be the entire Ragazine. This was about 25 or more years ago.