Science: Fly's Freight

One million germs are carried among the body hairs and on the feet of one ordinary housefly. Flies captured in garbage cans and other "obviously insanitary" places may be laden with as many as 6,000,000 germs each. Such was the report last week of the American Institute of Sanitation, two of whose staff research-ers minutely examined the bacterial cargoes of 400 flies.

Invaluable to any fly are the pads, two on each of its six feet, which secrete a sticky fluid and enable the fly to traverse vertical surfaces and ceilings. But as a...

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