people are fascinated because of how much they remind us of ourselves. they re magical creatures, highly intelligent, highly social, and there s something very fascinating and very mysterious about them that makes them, i think, alluring to all of us. reporter: national geographic spent several years deep in the jungles of rwanda and the congo documenting the lives of these mysterious beasts for their special kingdom of the apes. they form alliances. they form bands along the same lines of political lines. and there is that desire to be the leader. reporter: here in the mountains of rwanda, the voting booth is replaced by natural selection. their fearless leader is titus, a 400-pound silverback. titus is an amazing gorilla. he held that family group together for more than 30 years, which is unheard of really in