Going to the dogs

Along with all the cutting-edge oil and gas technology being developed with the support of the US government areUall the cutting-edge canines. Pooches have a sense of smell much more acute than that of humans—one report said "up to 10,000 times" more. But Duane Pickel, a dog trainer and former head of the Tallahassee (Fla.) Police Department, contends that the canine sense is "220 million times better" than human smell. With more than 200 million scent-receiving cells in each of their noses—compared with 5 million in a human nose—dogs on test have been able to detect 1 part/trillion of n-amyl acetate, a chemical that smells like bananas. A human can detect the substa...

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