A report by Horizon examining animal intelligence and looking at the reasons why no other animal has matched man in mental ability.
| Title | If Only They Could Speak |
|---|---|
| Genres | Documentary |
| Release Date | 1969-01-09 |
| Episode Runtime | 01 Hours 00 Minutes |
| Season Number | 6 |
| Episode Number | 2 |
| Production Companies |
No cast information available.
