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 neurological disease spread by rats and other animals may have become established in San Diego County.

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 ...

The wrinkly rodent barely seems to age and appears almost impervious to cancer, heart disease, and mental decline. Can these astounding abilities be adapted for humans?

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. SAN DIEGO (AP) — As an ambassador for rats, ...