"Sometimes you work like a dog on a car and it's not very fast, " he says.

WSJ: Gentlemen, Start Your Little Cars: These Derbies Are for Grown-Ups

"Truth is, Fido doesn't work like a dog's nose does at all, " says Colin Cumming, Nomadics' chief executive.

FORBES

The scientists said the device could work like "an artificial nose for a robot dog", sniffing out extremely low concentrations of vapour.

BBC: Plastic lasers shed light on hidden explosives

Paris employs a huge work force to keep the city clean and its use of golf cart-like vehicles to vacuum dog droppings has received admiring -- and sometimes wry -- attention in the international media.

CNN: We'll always have Paris

Today, most of our warrior dogs come from Europe, where there is a long tradition of institutions like the Royal Dutch Police Dog Association, and devoted amateurs breed, rear and train dogs in police-like work.

WSJ: Letting Slip the Real Dogs of War