Unlike mutts, hybrid dog breeds are crosses between two or more purebred dogs. To differentiate generations, geneticists use codes like F1, F1b, F2, etc.
People have always tried to “type” each other.Actors in early Greek drama (戏剧)wore masks to show the audience whether they played the villain’ (坏人)or the hero’s role.In fact , the words “person” and “personality” come from the Latin , meaning “mask” .Today...
Corsin Muller says future studies will try to show whether dogs can learn the meaning of facial expressions -- for example, whether a frown shows that someone is angry. "What we can say with our study is that they can discriminate them, that they can tell these ones are different. But ...