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1 .This is Scientific American 60-Second Science. I'm Cynthia Graber. Got a minute?
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2 .A bloodhound's sense of smell is far better than its owner's.
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3 .But human olfaction is still nothing to sneeze at.
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4 .Because your nose can detect at least a trillion individual scents.
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5 .That's according to research in the journal Science.
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6 .Researchers mixed together combinations of some of 128 different odors.
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7 .Study subjects then smelled three samples: two of the combination scents that were the same and one that was different.
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8 .Based on subjects' id's of the different smells, the researchers gauged how close the mixtures could be and still be distinguishable.
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9 .Those findings let them determine how many different scents could exist made of combinations of the original 128 odors.
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10 .The result was more than a trillion.
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11 .Researcher Andreas Keller of the Rockefeller University told the journal Science's podcast why humans have such a discerning sense of smell:
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12 ."Our olfactory system evolved…to discriminate very similar smells, like my baby from my neighbor's baby, milk that's still good from milk that turned bad.
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13 .So those are very similar smells that only differ in a few components.
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14 .So we evolved to be able to make those discriminations.
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15 .And as a side effect of that we can discriminate all those other odors too."
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16 .Thanks for the minute, for Scientific American 60-Second Science. I'm Cynthia Graber.
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