This squat concrete building was once a chicken coop, but now it’s part of a farm with an entirely different kind of livestock — millions of cockroaches.

As farmer Li Bingcai opened the door to his cockroach farm in southwest China, an insect the size of a dart flew into his face. Picking the critter off his forehead, he tossed it back into the dark ...

Cockroaches are often seen as pests to be eliminated, but in recent years, certain species have become surprisingly valuable. From pharmaceutical research to exotic pet feed, these resilient insects ...