Finding staple foods such as rice that can survive an unreliable water supply is essential to the world’s long-term food security. So, too, is finding ways to make the use of water in all areas ...

By the end of the 18th century, potatoes had become in much of Europe what they were in the Andes—a staple. Roughly 40 percent of the Irish ate no solid food other than potatoes; the figure was ...