Every person emits a unique blend of microbes into the air, and this “microbial cloud” is personalized enough that it could be used to identify people. Accord to CBS news, a new study finds that trillions of bacteria live on and in the human body. Together, these bacteria make up what researchers call the human microbiome. In the experiment, eight people were asked to sit in the chamber for two 90-minute periods. Researchers say: we were surprised to find that we could identify most of the occupants just by sampling their microbial cloud. Read the article here.