Featured in sniffing

DARPA Wants To Detect Chemical Attacks By First Mapping Every City’s Normal Scent
Microscopic Worms Could Sniff Out Explosives
Inhalable Vitamins Make Pill-Popping A Quaint 20th-Century Ritual
After $19 Billion Spent Over Six Years, Pentagon Realizes the Best Bomb Detector Is a Dog
The State of the Art of Electronic Noses
In Korea, Cloned Drug-Sniffing Dogs Report for Duty