The Humor Code. Entry 4: Do Animals Have a Sense of Humor? Slate, 3/26/14. "Scientists believe human laughter evolved from the distinctive panting emitted by our great-ape relatives during rough and tumble play; that panting functions as a signal that the play is all in good fun and nobody’s about to tear anybody else’s throat out." Unbelievable part about a gorilla tying her trainer's shoelaces and signing "chase." Animals got jokes!