Did you ever see research on pubmed etc which you would like to read in full rather than just a short abstract?

Some are free but many are behind a paywall costing quite a sum to read the full research paper and it might not even be of interest or cover the things that you want to know.

There are a few sites that offer full research papers for free but some are blocked by ISP's/governments.

The first is

http://sci-hub.bz/

Another is Library Genesis which is often blocked. It is blocked in the UK.

http://libgen.org

There are mirrors of this site which can allow access from places which block it. Here are a few, if you search for "libgen mirror" you might find other sites

https://libgen.unblocked.st/

https://libgen.immunicity.st/

https://libgen.bypassed.st/

35 Library Genesis Mirrors

These provide a large amount of research papers but the newest papers might not be available. sci-hub.bz did have a paypal donation but it looks like paypal has now disabled the account and blocked donations. Bitcoin is the only current method of donating. I have found a number of good research papers that I wanted after reading only the abstracts on pubmed.

To use it you get the DOI string from pubmed and then enter that into the search string. See image below: