Welcome to the Q&A Forum

Hey, thanks guys for the great feedback!

I am working with a client and recently discovered that they have several URLs that go to the same page.

http://www.maps.com/FunFacts.aspx
http://www.maps.com/funfacts.aspx
http://www.maps.com/FunFacts.aspx?nav=FF
http://www.maps.com/FunFacts.aspx?nav=FS
http://www.maps.com/funfacts.aspx?nav=FF
http://www.maps.com/funfacts.aspx?nav=ffhttp://www.maps.com/FunFacts.aspx?nav=MShttp://www.maps.com/funfacts.aspx?nav=
http://www.maps.com/FunFacts.aspx?nav=FF#
http://www.maps.com/FunFacts
http://www.maps.com/funfacts.aspx?.nav=FF

I am afraid this is happening all over the site. So, my question is:

Is this hurting the SEO and how?

If so what is the best way to go about fixing this problem?

Thanks for your help!