What is Navel lint?
[[File:Navel lint ball.jpg|right|300px|thumb|Green navel lint.]] [[File:Lint jar.jpg|thumb|A jar of navel lint balls]] '''Navel lint''', also called '''belly button lint''', '''belly button fluff''' or '''navel fluff''', is a collection of fluffy fibres in one's [[navel]]. Many people find that, at the beginning and end of the day, a small lump of fluff has appeared in the navel cavity. People have wondered why this happens for many years. In 2001, Dr. Karl Kruszelnicki of the [[University of Sydney]], [[Australia]], did a survey to find out why this happens. This is what he found out:<ref>{{cite news|date=2001-12-11|title=Fluff gazing|url=http://news.bbc.co.uk/60seconds/hi/english/your_views/newsid_1703000/1703851.stm|publisher=BBC News|access-date=2009-04-21|archive-date=2009-02-08|archive-url=https://web.archive.org/web/20090208220923/http://news.bbc.co.uk/60seconds/hi/english/your_views/newsid_1703000/1703851.stm|url-status=dead}}</ref> * Navel lint is mostly stray fibers from one's clothing, mixed with some dead skin cells, and body [[hair]]. * The lint comes from a person's shirt or top. The fibers move there from [[friction]] of body hair. * Women have less navel lint because of their finer and shorter body hair. Older men have it more because they have more hair and it is thicker. * Navel lint's color is usually [[blue]]-[[gray]]. The color is most likely an average of all clothing colors worn.<ref>{{cite web|url=http://www.feargod.net/fluff.html|title=The Incredible World of Navel Fluff|author=Graham Barker|work=Graham's Paddock|access-date=2009-04-21|archive-date=2004-10-09|archive-url=https://web.archive.org/web/20041009194623/http://www.feargod.net/fluff.html|url-status=dead}} – Barker is the Guinness world record holder for collecting Belly Button Fluff.</ref> * Navel lint is entirely harmless and does not need to be corrected. Dr. Kruszelnicki was awarded the [[:en:Ig Nobel Prize|Ig Nobel Prize]] for Interdisciplinary Research in 2002.<ref>{{cite news|title=Not noble, but navel fluff study win