Everyone is surrounded by a unique "cloud" of millions of their own bacteria, according to scientists at the University of Oregon in the US. Walk through someone else's cloud, and it will "rain" bacteria on your skin and be breathed into your lungs. The study on 11 people, published in the journal PeerJ, showed it was possible to identify people from their microbial miasma. ... Groups of bacteria in the cloud included Streptococcus, which is common in the mouth, and the skin bugs Propionibacterium and Corynebacterium. The researchers argue the mix may have a "forensic application" to detect whether someone...