For science-related articles, I'd recommend Science and Nature.
1. They're really, really expensive. 2. They're extremely technical, and you're unlikely to know enough about all the various fields that publish in them to be able to read through them cover to cover. And if you're only reading a single article, why pay that really expensive cost? 3. They have the reputation of publishing what's sexy, not what's necessarily well done. They've published some crappy science over the years just because they'll get a lot of attention for it.
Instead, I'd recommend American Scientist[0], which is today what Scientific American was 30 years ago, while Scientific American has become what Discover was 30 years ago. It's well written for a general audience while still covering a wide range of subjects, and it's reasonably priced.