Word: dunninger
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Modern bomber-plane crews know just what to do when their receivers pick up the pings of an enemy radar. They transmit pings of their own designed to confuse an oncoming fighter or trick an attacking missile into veering toward empty air. Such sophisticated electronic countermeasures may be the latest...
Now, with Dr. Dunning's help, Roeder has discovered much more advanced moths that send out their own sonic signals; they can make clicking sounds that are not very different from the search-sonar pulses of bats.
To learn the purpose of such moth clicks, Dunning and Roeder caged the insects in front of a loudspeaker and exposed them to batlike trains of ultrasonic pulses. At once the moths started clicking in what seemed to be an effort to confuse an oncoming bat. To test the effectiveness...
Roeder and Dunning are not quite sure why the trick works. The moth's sounds may convey the message that the sender is not good to eat, or in some way they may deceive the bat's echo-location system. Whatever the moth clicks do, they are as...
Dunning noted that Cambridge Citizens Opposed to Compulsory Fluoridation had raised $800 in Cambridge and gotten a contribution of over $10,000 from a group called the Massachusetts Citizens Rights Association. Inc. In contrast, he said, the Cambridge Citizens Committee for Dental Health, of which he was vice-chairman, received...