Great idea! - it would be nice to know, prior to clicking, that these are pdf downloads and not web articles. - it would be useful for the subtitles math | ph

Great idea! - it would be nice to know, prior to clicking, that these are pdf downloads and not web articles. - it would be useful for the subtitles math | physics | etc be links - the ~1MB image took about 15 seconds to load on my solid wifi connection. - more content, please :)