I'm hearing the same music in several Discovery Channel documentaries. Is this a song or a melody composed just for Discovery documentaries?
The piece can be heard at the 18:10 mark in this video.
Edit: The video I originally linked to was deleted so I've provided a new video link. The video's name is "The Ape Who Went to College" from Animal Planet but I think I also heard it in another series like Mystery Cars (a TV show about vintage dream concept cars) and, as I mentioned, I have heard this music in lots of other documentaries.
I don't know if this helps but I'm guessing some of the Discovery Documentaries were made by the BBC and PBS.