How to Have Fun Like Monkeys, Whales and Foxes

Here is an article about animals that are having 'fun' in their life. It is really interesting and also cut at the same time, I can imagine myself looking at the monkey playing in the water and saying 'How cute!'

"That, it turns out, is a scientifically uncertain and even controversial question. It's difficult to study animal emotions with formal rigor, and the notion that animals might have rich inner lives was disregarded for much of the 20th century. From the behaviorist perspective pioneered by psychologists like Ivan Pavlov and B.F. Skinner, thinking animals had complex emotions was an unjustified assumption."

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