Cameras tracked their movements and were used to control a rat-sized robot that shared a cage with the rodent subjects.

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In fact, last year TWU Local 100 ran a YouTube video noting that for every rat subway riders saw, there were 8-10 more in hidden areas throughout the subway system.

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The study (PDF) used laboratory rats that were fed either a high-fat or low-fat diet of rat vittles.

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Simon Pope, a spokesman for the World Society for the Protection of Animals in London, said his group would like to know whether other rat-control methods that don't involve toxic substances were investigated and what assessment has been made about the pesticides on the birds.

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Intel's microprocessors were then taking off--and investors were looking to knock out Intel with a new chip, even one as crazy as a rat smell center.

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