Tickling Techniques from Science News on Vimeo. Last month, I posted about laughing rats. Well, here’s the follow-up: chortling chimps, orangutans, gorillas, and bonobos. From the article posted on Science News’s website: Don’t try this at home, but tickling a gorilla, orangutan, bonobo or chimp can inspire bursts of grunting sounds. Yes, that’s laughter, says…