As humans, we are so used to hiding our feelings as if we were born with this habit. Most of the times we can’t even get the slightest of the idea that the other person is in pain or maybe stressed, that’s how perfectly humans hide our emotions. Now, let’s talk about mice who can’t help but feel other mice’s sadness, pain or suffering. The researchers have found that mice are able to feel complex emotions. They share the sadness, when people feed alive mice to their pet snakes, the rest of the mice in captivity are getting depressed too.