Apes return to the blog

In this Associated Press photo provided by the San Francisco Zoo, Hasani, the 7-month-old infant western lowland gorilla, rides on the back of his surrogate mother at the San Francisco Zoo, as another member of the troop walks in the background on July 2. Over the last few months, the primate team has slowly introduced each of the five members of the Zoo's gorilla troop to Hasani.