Mysteries of the theory of evolution

Somehow happened to visit the zoo and to witness a curious picture.
In a large orangutan cage sits down and looks at the people passing by. By Faith clear that he thinks of others, and in particular about what is happening in general. Description - Senior Researcher with a hangover. So. Gathered outside his cell small boys 12-14 years or so. And they curve it faces, actively gesticulating and commenting on what is happening. Just like in a circus, but the reverse side. And when the boys got bored, because the object did not respond, they calmed down ... Then the monkeys majestically slowly raised his hands and applauded!
And I stood there and thought - so who of us evolved? Or it is the missing link?