介绍:
从小家长们就会告诉孩子,吃东西前一定要洗手,特别是摸了钱之后.看来这样的警告非常有道理,华尔街日报的一篇报道说,科学家发现钱币上的细菌数量非常惊人.
A report by the Wall Street Journal says talking about dirty money, scientists are discovering a surprising number of microbes living on cash.
In the first comprehensive study of the DNA on dollar bills, researchers at New York University's Dirty Money Project found that currency is a medium of exchange for hundreds of different kinds of bacteria as bank notes pass from hand to hand.
By analyzing genetic material on $1 bills, the New York University researchers identified 3,000 types of bacteria in all—many times more than in previous studies that examined samples under a microscope. Even so, they could identify only about 20% of the non-human DNA they found because so many microorganisms haven't yet been cataloged in genetic data banks.
