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 ...

Algorithms learned to sift ultrasonic rat squeaks from other noise, which could help researchers who study rodents’ emotional states. Lucy Huang reports.

No_Salary5918 said: "Generally, if you do something to a rat and it doesn't flinch/ flee, scratch, or squeak - congrats. you need to keep doing that until the end of time, because that is the ...