"These stray dogs live in the outskirts of Moscow Russia and commute on the underground trains to the city centre in search of food scraps. After a hard day scavenging and begging on the streets, they hop back on the train and return to the suburbs where they spend the night. Experts studying the dogs, who usually choose the quietest carriages at the front and back of the train, say they even work together to make sure they get off at the right stop – after learning to judge the length of time they need to spend on the train."
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