BBC News
An idea used as an April Fool's joke could soon be helping save lives. Siemens is developing small sensors that can detect a wide variety of odours, opening the door to portable devices that can spot fires or health problems early.
Doctors have long known that trace elements in breath can give clues to a person's underlying health.
The tiny detectors could even be used in cars to stop people taking to the road when drunk.
Dr Max Fleischer and colleagues at Siemens' Corporate Technology division in Munich have been developing the technology behind the sensitive chips.
More:
http://news.bbc.co.uk/1/hi/technology/3683794.stm