the walking dead

United States Department of Agriculture

If you’re unfamiliar with the show The Walking Dead, zombies (called "walkers" in the show universe) have taken over the landscape. Our cast of gun-toting survivors have been left holed up in a suburban compound surrounded by large walls.

This week, two main characters venture outside the compound on a scavenging mission equipped with a map to nearby agricultural supply stores.  Before they leave, a third character tells them to keep an eye out for sorghum. He says it will likely be untouched and it would make their farming situation “hunky dunky.”

A quick glance at Twitter and a few text messages from friends and family all asked me the same question: What is sorghum and why do our post-apocalyptic heroes -- and sometimes anti-heroes -- need it?