What is a hedge fund and how is it different from a mutual fund?

Had a student ask this question this semester so I am sure he was not the only person who does not know:From Examiner.com What is a hedge fund and how is it different from a mutual fund?:"Hedgefunds, unlike mutual funds, employ a wider array of ivesting techniques, which are considered more aggressive. For example, hedge funds often use leverage to amplify their returns (or losses if things go