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In this episode of the Pez family podcast, journey beneath the English Channel to discover the Chunnel—one of the Seven Wonders of the Modern World! Learn how 11 massive tunnel boring machines dug 31 miles through chalk beneath the sea, how engineers kept water out with liquid nitrogen freezing techniques, and how British and French workers met in the middle with incredible 20-inch precision. Explore the high-speed trains that zoom through at 100 mph and discover hands-on activities to build your own tunnel!
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