The length of Seikan tunnel (the 2nd longest tunnel in the world) is ...
The length of 1 Seikan tunnel (the 2nd longest tunnel in the world) is 53.85 kilometers. That is ...
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2 times bigger than Mt. Olympus on Mars (the highest mountain in the solar system) (1.99 to be exact).
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5 times bigger than depth of Mariana trench (4.94 to be exact).
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6 times bigger than Mt. Everest (6.09 to be exact).
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28 times bigger than Yamanote Line between Tokyo-Shimbashi .
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55 times bigger than Angel fall (the highest waterfall in the world) .
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83 times bigger than Warsaw radio tower .
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205 times bigger than Japanese battleship Yamato .
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6,017 times bigger than world record of long jump .
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17,667 times bigger than height of basketball ring .
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735,656 times bigger than diameter of baseball ball .
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10,770,000 times bigger than length of red ant .
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107,700,000 times bigger than diameter of ovum .
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673,125,000 times bigger than diameter of hair .
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2,692,500,000 times bigger than diameter of wool fiber .
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76,928,571,429 times bigger than red light wavelength .
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1,538,571,428,571 times bigger than diameter of bacterial flagella .
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2 times smaller than distance from Osaka to Tokushima (2.08 to be exact).
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3 times smaller than Danyang–Kunshan Grand Bridge (the longest bridge in the world) (3.06 to be exact).
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5 times smaller than distance from Osaka to Toyama (5.02 to be exact).
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6 times smaller than distance from osaka to Nagano (6.03 to be exact).
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7 times smaller than distance from Osaka to Gunma (6.92 to be exact).
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8 times smaller than distance from Osaka to Chiba (8.01 to be exact).
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9 times smaller than distance from Osaka to Ibaraki (8.97 to be exact).
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35 times smaller than distance from Sao Paulo to Buenos Aires .
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40 times smaller than distance from Tokyo to Taipei .
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90 times smaller than distance from Cape Town to Nairobi .
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97 times smaller than distance from Cape Town to Ivory Coast .
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829 times smaller than equator .
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85,846 times smaller than diameter of the Sun .
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463,289 times smaller than distance that light travels in 1 minute .
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4,797,955 times smaller than distance to the Sun .
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43,064,965 times smaller than diameter of Saturn .
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349,401,818 times smaller than diameter of Pluto .
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5,914,531,729 times smaller than distance that light travels in a day .
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964,536,301,160 times smaller than diameter of Pleiades .
