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Modern Marvels S2 Ep19: TunnelsTunnels, whether underwater, blasted through solid rock or negotiating the shifting strata of the Earth's unstable crust, represent a remarkable feat of engineering.

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Now PlayingModern Marvels S2 Ep19: TunnelsTunnels, whether underwater, blasted through solid rock or negotiating the shifting strata of the Earth's unstable crust, represent a remarkable feat of engineering.0Modern Marvels S16 Ep4: American TruckingBrad Paisley and his crew of truckers on the road between Little Rock and Tulsa; the Ford F-150 tackles a devilish test course; the world's most nimble tow truck extracts a car from the tightest parking spot imaginable; Mack truck fanatic.