I love Facebook but I just despise people that post garbage from the internet.  Fake news. Fake science. Fake theories.  When are people going to wake up and figure out that just because something is posted on the internet DOES NOT MEAN IT'S TRUE!!!

Almost every claim can be checked out by Googling the subject and looking for legitimate sources.  For example the mayo clinic or NIH are pretty good sources.  For science issues scientificamerican.com or smithsomianmag.com.  For politics I like Politifact - I don't always agree with their conclusions but they show their sources of information.

It's a pretty good idea to check things out with sources that have widely acclaimed reliability.