People who are anti-science frequently say that "science is always changing its mind", what is more accurate to say is that "science is always expanding what it knows". This sometimes causes changes in conventional wisdom.
It's also true that many misconceptions have been created by people who don't really understand science trying to explain science. Some of those people even write books (many of which can be found in the 'self help' section of your local library) or screenplays. So, these people pass on 'knowledge' which is wrong and the people reading the book or watching the movie then continue to spread bad information.
Here, from ASAP Science is a quick rundown of things that you may 'know' about the human brain, that are wrong.
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