Animal Planet has renewed “The Zoo: San Diego” for a second season, TheWrap has learned. And this one is gonna be cuuuuuute, featuring a new baby hippo, two rescued mountain lion cubs and a koala joey ...

These are the most popular (and fiercest) head-to-head animal battles, featuring lions vs. hippos, mongoose vs. cobra, and many more. Intro 0:00 Leopard vs. lion 0:26 Wart-biter vs. praying mantis ...