LOADING

Clip

Facing Critics

Although Penny was sure that Koko was communicating with her, another ape language specialist, Herb Terrace, became convinced that the whole field was flawed, and published a study to suggest that apes did not know what they were saying, a blow to Penny and other scientists working in the field.
Aired: 8/2/2016 | 0:03:20
You may also like
  • Twice Born
  • Blue Sky Metropolis
  • Earth's Sacred Wonders
  • Humanity from Space
  • NOVA
©2020 PUBLIC MEDIA NJ, INC. ALL RIGHTS RESERVED.   PO Box 5776, Englewood, NJ 07631