High speed trains push air in front of them when they enter a tunnel, creating a unique booming sound.
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Youtube Description: This 50 minutes long BBC documentary film is aired in the year 2011. The BBC film says it is the first and the most technological advance in the world, ancient chariot racing, the... continue reading
posted by oohlalasassoon 1 decade 11 months 2 weeks ago • 556 views • 48:32- 1