Entomology: 8,000 Dangerous Females

The white-trimmed brick building at Beltsville, Md., is swarming with frustrated maidens and looks like a young ladies' finishing school. But there are no students among the 8,000 carefully segregated females who live there. They all work for the U.S. Department of Agriculture, and they spend their lives in milk cans warmed by a gentle stream of air. Raised and cared for by Entomologist Robert T. Yamamoto, these sex-starved cockroaches are fed on dog meal, and their only job is to exude a sex lure that drives male cockroaches crazy.

Entomologists have...

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