For some time now, various forces have been pushing us away from using paper money to pay for things. That goal may have a hidden bonus: Cash, it turns out, is crawling with bacteria. Although researchers have known for some time that microbes can, and do, live on money, a new study from Hong Kong shows that these bacterial communities are more substantial than previously suspected. Cash, it turns out, could be an excellent way to monitor the microbes circulating through a city.
Detail on Newsweek.