We Human beings love to be always happy and laughing and smiling are considered as the symbols of Happiness. Just opposite of the happiness is Sorrow. Crying is seems to be the common symbol of sorrow. This is a human nature.
But have you ever think about same situation in animals and how they express their happiness and sorrow? I heard and read regarding this subject and what I noticed that commonly people having the viewpoint that animals can’t laugh. Scientists and animal observers are still studying about the same issue. They believe that animals also can laugh
Eventhouh we human beings are well developed, once we also were like the animals. Due to the changes that occurred in human brain this particular species developed miraculously. Development of human brain was so fast. They learned and invent new and new things and now in the utmost stage of development.
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