Rats make an ultrasonic sound when they eat chocolate

Animal sounds could be a window into their internal emotions, new research indicates. More information Adding us as a Preferred Source in Google by using this link indicates that you would like to see more of our content in Google News results. Rat vocalizations have been linked to different emotions and motivational states. Breakthroughs, discoveries, and DIY tips sent six days a week. By signing up, you confirm you are 16+, will receive newsletters and promotional content and agree to our Terms of Use and acknowledge the data practices in our Privacy Policy .