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 ...

Mice and rats vocalize. To us, many of the sounds they make are ultrasonic—at too high a frequency to hear. But if we slow the calls down, they sound like squeaks. And not all squeaks are the same.

A tickle can send a rat into a fit of ultrasonic giggles. New research reveals what goes on in a rat’s brain during a tickle attack. Scientists knew rats loved to be tickled, especially on their backs ...

Pet rats are intelligent, social, and affectionate companions that make wonderful additions to many households. Despite common misconceptions, these small rodents are clean and trainable and bond ...