Today's smile belongs to the animals. Psychologists often look to the animal world as a model for the human one. And there's a lot we can learn, not only about our baser instincts, but about our better ones, like empathy (even for animals of other species). And they're very good humored about being the butt of many jokes.
We often see the loving care with which many animals care for their young. But the scenes of their taking care of even other kinds of animals are beautiful and inspiring
Soldiers coming home from war can get an especially moving welcome.
Another problem caused by deforestation
Gary Larson explains why the dinosaurs really became extinct.