"Mormons practice polygamy". myth? technically, no.

http://www.washingtonpost.com/opinions/five-myths-about-mormonism/2011/08/03/gIQAyIhTwI_story.html
this is technically not a myth. ask mormons if they believe in eternal plural marriage? i.e. can a mormon man today be eternally married to more than one woman? (answer: yes. if a man's wife dies, he may be married for "time and all eternity" to a new woman, *in addition to his dead wife*). "eternal" polygamy is still practiced. joseph smith is btw sealed/married to more than 200 women. one of them women is 169 years older than him and another was born 15 years after he died! (source 1: http://www.flickr.com/photos/nickleus/4960128084/ ) (source 2: new.familysearch.org)