Melissa Block talks with researcher Thore Bergman about his findings that a rare type of Ethiopian monkey, the gelada, makes a human-like sound that could offer insights into the evolution of human speech.
WNYC 93.9 FM and AM 820 are New York's flagship public radio
stations, broadcasting the finest programs from NPR and Public Radio
International, as well as a wide range of award-winning local
programming. WNYC is a division of
New York Public Radio.