Horizon investigates the linguistic potential of non-human species.
| Title | Signs of the Apes, Songs of the Whales |
|---|---|
| Genres | Documentary |
| Release Date | 1984-03-26 |
| Episode Runtime | 01 Hours 00 Minutes |
| Season Number | 21 |
| Episode Number | 10 |
| Production Companies |
No cast information available.
