体味的秘密

B.O. Gives Up Its Stinky Secrets

Body odor. The smell of B.O. is unmistakable. And the culprit behind that signature stench is a molecule called thioalcohol. Our noses are so attuned to it, we can pick up quantities as small as one part per trillion. But here's the mystery: How does that stinky substance get there in the first place?

Well, it turns out bacteria named Staphylococcus hominis is the major perpetrator, along with a few of its relatives. Their genes code for enzymes that snip the molecules in our sweat to pieces - creating the offensive thioalcohols, along with bits of food for the bacteria - 'cause, hey, bacteria gotta eat, too.

津巴布韦缺钱卖大象

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卡斯特罗露面

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每天一杯奶,强壮欧洲人

断奶之后,大部分人的乳糖耐受力会逐渐退化。但假如一喝牛奶就拉肚子,那么,你这辈子都活该当穷鬼。因为新研究表明,越能消化乳糖的民族,往往越富有。