![]() Bridget Young, an infant-nutrition researcher at the University of Rochester, told me milk was an “ecological system” Alan S. They can even describe, mostly, what milk does: nourish, protect, and exchange chemical signals with infants to support development and growth.īut few of these answers get at what milk, materially, compositionally, is actually like. ![]() They can describe, mostly, where it comes from: mammary glands via, usually, nipples (though please note the existence of monotremes, which ooze milk into abdominal grooves). They can describe, mostly, who makes it: mammals (though arguably also some other animals that feed their young secretions from their throat or their skin). ![]() The trouble is, no one can really describe what milk is-least of all the people who think most often about it. If an alien life form landed on Earth tomorrow and called up some of the planet’s foremost experts on lactation, it would have a heck of time figuring out what, exactly, humans and other mammals are feeding their kids. ![]() ![]() This article was featured in One Story to Read Today, a newsletter in which our editors recommend a single must-read from The Atlantic, Monday through Friday. ![]()
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