Des aliens dans le métro de New-York!

Scientists and volunteers started the project in 2013 and found 637 known bacterial, viral, fungal and animal species when swabbing the spaces between commuters and street musicians and logging the data in real time with a mobile app.

Most of the bacteria the group found were harmless, though nearly half (48 per cent) of the DNA found matched no known organisms, according to the published study at Cell.com.

http://www.dailymail.co.uk/news/article-2941720/E-coli-dysentery-meningitis-BUBONIC-PLAGUE-NYC-subway-DNA-tests-scientist-says-won-t-die-lick-one-metal-poles.html