What is Milk?
[[File:Milk glass.jpg|A glass of milk|thumb]] '''Milk''' is a [[white]] [[liquid]] made by [[mammal]]s, like [[cow]]s, [[dog]]s, and [[human]]s. It is made in the [[mammary gland]]s (breasts, udders, or teats) of [[female]] [[mammal]]s. Newborn babies must be given milk before they can eat solid [[food]]. Milk has many [[nutrient]]s to help babies grow and be healthy. It is also a rich source of calcium which is good for their bones and teeth. == Storing milk == [[File:AL QASUS VENDOR IN DAR.jpg|thumb|Milk vendor in [[Dar es Salaam]] ([[Tanzania]]).]] If milk is not kept cold in a [[refrigerator]], it will become [[wikt:sour|sour]] after some time. When milk is warmed, it turns sour.<ref>{{Cite web |url=http://imqh.com/sour-milk-recipes/ |title=Sour Milk Recipes |work=imqh.com |accessdate=29 April 2010 |archive-date=27 March 2010 |archive-url=https://web.archive.org/web/20100327193207/http://imqh.com/sour-milk-recipes/ |url-status=dead }}</ref> [[Fermentation]] makes this happen. [[Pediococcus|Lactic acid bacteria]] change the milk [[sugar]] into [[lactic acid]]. Fermentation is used when making [[dairy product]]s. Milk is often [[pasteurisation|pasteurised]] before humans drink it. It is made into dairy products like [[cream]], [[butter]], [[yogurt]], [[ice cream]], or [[cheese]]. Pasteurised cows' milk will turn sour if it is not kept in a [[refrigerator]]. Milk should be stored between 1° and 4° [[Celsius]]. If milk is treated with very high temperatures, it will last longer before spoiling. This means it does not have to be put in the refrigerator until it is opened. == Goat milk == Goat's milk is the milk from a [[Domestic goat|goat]]. It can be drunk, both by humans or baby goats, or cheese can be made from it. This cheese is called [[goat's milk cheese]].<ref>{{Cite web |url=http://www.goat-milk-powder.com/Category/70/Fresh-goat-milk.aspx |title=CBM - Fresh goat milk - fresh goat milk from CBM |work=goat-milk-powder.com |accessdate=29 April 2010 |archive-date=24 April 2010 |archive-url=https://web.arc