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 new study suggests that the NOVA1 gene may have been a key player in the evolution of human language. By Carl Zimmer Scientists have long struggled to understand how human language evolved. Words ...

Rats may carry out certain activities just for the fun of it, says new research on the animals' behavior. In a study published in the journal Science researchers found that rats were capable of not ...