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Canada has the longest coastline in the world, with a coastline stretching over 202,080 kilometers (125,570 miles).
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The Equator is the longest line of latitude and it is at 0 degrees latitude.
Yes, the Ob River in Russia is the 7th longest river in the world, not the 5th. It is approximately 2,268 miles (3,650 km) long.
Alaska is the longest state in the U.S. with a span of approximately 1,500 miles from its westernmost to easternmost point.