Wildlife biologist Liz Bonnin sets off on a worldwide journey of discovery to find out why animals of different species make friends with each other, and even with humans. 　　Episode 1 of 2 　　DURATION: 1 HOUR 　　Animals that behave in ways we would never expect fascinate us. In recent years, the internet has been changing the perception that most species have evolved to stick to their ... (展開(kāi)全部)