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Why are railway tracks built on stones?

At first glance, it looks strange. Heavy trains moving at high speed, supported by loose rocks instead of solid concrete.

But beneath those rails is one of the smartest engineering solutions ever created.

In this video, we'll uncover the real reason railway tracks sit on sharp stones called ballast.

From weight distribution and vibration control to drainage, weed prevention, and even a surprising history that links modern railways to ancient ships at sea, this video explains it all.

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