Mars, a baby pygmy hippo at Tanganyika Wildlife Park, has a very strong opinion about going back inside. It becomes a daily 'struggle' for handlers.

CINCINNATI (WXIX) - The Cincinnati Zoo is determined to prove that hippos can fly during the Red Bull Flugtag event on Aug. 9 ...

Zoo's new baby pygmy hippo refuses to cooperate with keepers in adorable videoSource: Tanganyika Wildlife Park/TMX ...