Rats are social and chatty critters, but most of their chatter is above the frequency that human ears can hear. If researchers could listen to what rats are “saying,” it could change countless experiments. This week, we try our hand at recording ultrasonic rat squeaks, and visit some scientists who built their own software to make sense of what we captured.

You can listen to some of the rat calls here: http://bit.ly/2trAh8M

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