Craving Earth by Sera L. Young
Human biology and culture are interwoven in this exploration of pica, the craving to eat clay, dirt, starch and other nonfood substances.
Columbia Univ. Press, 2011, 228 p., $29.50.
You can read this article for free.
Here’s why you should subscribe anyway.
To celebrate our centennial, we have made our entire archive available for free. But quality journalism comes at a price. Support the next century of science journalism. Subscribe to Science News for as little as $2.99 a month.