How do whales hear music? They listen to orca-stras! I told that joke to a lizard and got crickets. It made me wonder the same thing as Eid Muhammad Afridi, who asked Saturday’s Weird Animal Question of the Week, “Do animals laugh?” So far, apes and rats are the only known animals to get the giggles. Koko, the western lowland gorilla famous for her facility with sign language, “thinks that me being clumsy is funny,” and will make laughing noises, says Penny Patterson, president of the California-based Gorilla Foundation.