A viral video currently doing the rounds shows a large herd of sheep mysteriously walking round and round in a large circle. The unusual phenomenon was captured at a farm in the Inner Mongolia region of Northern China and had reportedly been going on for at least 10 days, according to the Chinese newspaper People's Daily. The media in China said that the behavior, shown in the black-and-white CCTV footage (video below), had no clear explanation, leading internet users to develop their own juicy theories. In between ideas of alien invasions and doomsday omens, many were speculating that the behavior…