Science: Love Song

How a male moth can find a female—even at night, through fog, and as far as seven miles away—is a favorite puzzle of entomologists. The male moth flies unerringly downwind, which rules out the possibility that the female sends out odorous particles. In the latest Interchemical Review (research house organ of Interchemical Corp.), John P. Duane and John E. Tyler, both of Interchemical, suggest a solution of the puzzle.

Duane (an amateur entomologist) and Tyler (a spectroscopist) teamed up to test the possibility that female moths send—and the males receive—mating calls in infrared (heat) waves. The researchers first took the temperature...

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