Mary Roach Quotes: There are naturally large individual differences in the chemical makeup of people's saliva. ...

There are naturally large individual differences in the chemical makeup of people's saliva. (Mary Roach)

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Mary Roach Quotes: There are naturally large individual differences in the chemical makeup of people's saliva.

Mary Roach Quotes: There are naturally large individual differences in the chemical makeup of people's saliva.

Mary Roach Quotes: There are naturally large individual differences in the chemical makeup of people's saliva.

Mary Roach Quotes: There are naturally large individual differences in the chemical makeup of people's saliva.

Mary Roach Quotes: There are naturally large individual differences in the chemical makeup of people's saliva.

Mary Roach Quotes: There are naturally large individual differences in the chemical makeup of people's saliva.

Mary Roach Quotes: There are naturally large individual differences in the chemical makeup of people's saliva.

Mary Roach Quotes: There are naturally large individual differences in the chemical makeup of people's saliva.

Mary Roach Quotes: There are naturally large individual differences in the chemical makeup of people's saliva.

Mary Roach Quotes: There are naturally large individual differences in the chemical makeup of people's saliva.

Mary Roach Quotes: There are naturally large individual differences in the chemical makeup of people's saliva.

Mary Roach Quotes: There are naturally large individual differences in the chemical makeup of people's saliva.

Mary Roach Quotes: There are naturally large individual differences in the chemical makeup of people's saliva.

Mary Roach Quotes: There are naturally large individual differences in the chemical makeup of people's saliva.

Mary Roach Quotes: There are naturally large individual differences in the chemical makeup of people's saliva.