Sir David Attenborough tells the story behind one of the most important scientific discoveries of the modern era; that of finding our earliest ancestor, a primate nicknamed Ida.
The discovery of a new powerfully built ape fuelled stories of savage beasts.
The largest of the primates, gorillas aren't as savage as they were once thought to be.
View images of Sir David Attenborough as he presents Gorilla Revisted.
Everyone has a soft spot for the iconic orang-utan, the king of the swingers.
Orangutans can put their arms around your neck while you're filming.
Zoologist and TV presenter Charlotte Uhlenbroek does a rendition of a pant hoot.
Charlotte Uhlenbroek talks about Freud the chimp.
Charlotte Uhlenbroek tells how she saw a chimp wiping the dirt off his hand with a leaf.