Study suggests rats smile with their ears
Thursday, December 15, 2016 - 08:51
in Health & Medicine
(Phys.org)—A team of researchers with the University of Bern in Switzerland has found that as part of feeling happiness, rats undergo a slight physical change. As the team notes in their paper uploaded to the peer-reviewed open access site PLOS ONE, the rats under study demonstrated happiness by lowering their ears.