Science: Footprints on the Rug

It has long been known that certain materials become electrified when they are rubbed together. That is, they lose or gain enough electrons to acquire a charge of static electricity. In this state, the materials will attract dust, hair and other lightweight fluff that happen to have an opposite charge. Now a British researcher has proposed that this phenomenon be used for a practical purpose: to help track down criminals.

Distinctive Field. The idea comes from Physicist Kurt Greenwood of the British textile industry's Shirley Institute in Manchester; he has been studying ways...

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