Rats make a high-pitched sound similar to laughter when they're being tickled. Pexels / Denitsa Kireva Rats, they’re just like us: The oft-maligned rodents love to play games and be tickled, and ...

Rats seem to emit ultrasonic squeaks of happiness just because they are in the company of another rat. Using newly developed miniature microphones that were placed on rats’ noses, scientists have been ...