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Spit take

Spit happens: Saliva’s mysteries revealed – CNN.com

Your saliva is doing all kinds of useful things for you all the time — for instance, helping you chew and taste food. It’s also home to more than 600 species of bacteria, which are harmlessly enjoying the moisture of your mouth.

Since people have different eating habits in different places, you might think an American’s saliva might look a lot different from, say, a South African’s. But a new study published in the journal Genome Research finds that bacteria in saliva may not be as related to environment and diet as you might think.

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