Way back in the dark ages of the 70s, there was a magazine called Omni, put out by Penthouse publisher Bob Guccione. It was a great magazine which mixed science, pseudo science and science fiction all between the same, beautiful covers. It ran from 1978-1995 in a print version going another three years online.
Now, the entire print run is available, for free. you can find scans of every page, here. Of course, going through 17 years of a magazine can be difficult if you don’t know what you’re looking for, so here ya go, an index of the contents is here. It’s an amazing amount of work.