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Why do dogs wag their tail or tuck it in? Detailed answer

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Why do dogs wag their tail or tuck it in?

Under the tail of the dog is a special gland responsible for the individual smell. When meeting dogs, they sniff each other there and remember the smells. Dogs wag their tail when they want to "introduce themselves", show their disposition and spread the scent as much as possible. And when frightened, on the contrary, they tighten their tail.

Authors: Jimmy Wales, Larry Sanger

 Random interesting fact from the Great Encyclopedia:

What are the most common surnames?

Over 80 million Chinese have the surname Chan. This is the most common surname in the world. In the West, the most common surname is Smith (English) or Schmidt (German). In the USA, for example, there are about 2,5 million "Smiths" (something like the Russian surname Kuznetsov).

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