Smiling animals

It will be surprising if one day you realize that the animals around you also have emotions and can laugh.
Here are pictures that show how animals laugh

Leopards learn to laugh
Pig goes to the dentist because he laughs too much
Lions learn to laugh

Chimpanzees become gloating masters

Hippo Takes Up Ballet
when The owl discovered the funny prank Knock-Knock

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Au Gia Lam