Mammals have a really good memory Some orangutans learn how to fish This dog knows he's at the vet.
Having such good memories means they remember their suffering.
For instance, these cows are happy for returning to pasture after a long winter.
Emotionally mammals are very developed, like us.
They share with us many of our feelings, such as fear and love.
This Humpback Whale, for instance, realizes she's been saved from a fishing net and lets her rescuers know she is thankful.
Non-mammal animals on the other hand appear to be quite different from us, but birds always find ways to puzzle us. »
