One study found that rats emitted ultrasonic vocalizations when they were subjected to manual somatosensory stimulation, i.e., tickling. The results of this controversial research were published in ...

A new study is linking brain behavior to silly playtime practices. And they have lab rats laughing out loud to prove it.In the video above, you can hear tiny high-pitched giggles from a rat being ...

A ticklish rat is an adorable sight to see. The chubby little rodent darts toward a scientist’s gloved hand, eager for the delightful agony of its next scratch. It emits rapid-fire, ultrasonic ...