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1 .This is Scientific American 60-Second Science. I'm Sophie Bushwick. Got a minute?
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2 .The fuzzy sure is cute.
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3 .Until it opens its mouth.
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4 .(Sound of koala vocalization.)
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5 .The mating call of a male koala has roughly the same pitch as an elephant's trumpet.
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6 .How does this tiny mammal produce such a low voice?
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7 .Back in 2011, as a previous 60-Second Science explained, researcher Benjamin Charlton of the University of Sussex suspected the position of the voice box was responsible.
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8 .Now, Charlton and his team have discovered an entirely new organ may be the source.
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9 .In most mammals, sound is produced when air passes through the voice box and vibrates its inner membranes, called vocal folds.
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10 .But male koalas have an extra set of vocal folds, located in their throats but outside their voice boxes.
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11 .These velar vocal folds are three times longer than the pair in the voice box and weigh 683 times more.
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12 .The work is published in Current Biology.
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13 .Large and heavy velar vocal folds let male koalas bellow at low frequencies.
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14 .So they can draw in lady koalas, who think a low voice is highly attractive.
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15 .Thanks for the minute, for Scientific American 60-Second Science. I'm Sophie Bushwick.
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