Rats Laugh When Tickled—and They Prefer It
Imagine a world where laughter isn’t just the domain of humans—it fills the quiet corners of laboratory cages, echoing in the ultrasonic frequencies of tiny creatures that scurry unnoticed beneath our feet. The idea is almost unbelievable: rats, those misunderstood survivors of cities and forests, don’t just respond when tickled—they actually laugh. Even more astonishing, ...