Male Koala's Baritone Crooning the Result of Unique Vocal Folds [Video]
Dec 03, 2013 04:54 PM EST
Deep voices aren't just for crooners like Elvis Presley, Frank Sinatra, and Nat King Cole — male koalas attract mates with low-pitched bellows as well. The secret behind their ability to sing so low, however, lies in the unique location of a pair vocal folds not found in any other land mammal, a new study reveals.