Rats can’t talk, but researchers say there is one easy way to tell if they’re happy: look at their ears. A group of Swiss scientists tickled rats to make them happy for science, in a delightful study ...

Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. When researchers tickle rats for science, everybody wins. Although ...

Researchers in Australia tickled the rodents every day for a month to see if it would improve their emotional well-being. By Yan Zhuang MELBOURNE, Australia — It’s generally not a good time to be a ...

When researchers tickle rats for science, everybody wins. Although scientists know how to read rats' faces for pain, aggression, and fear, they've paid little attention to identifying positive ...