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When Was the North Pole Discovered?
If you’re coming to Wonderopolis today, you’d better bring a jacket. It’s going to be chilly!
When Was the North Pole Discovered?
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How Long Is the Great Wall of China?
Put on your hiking boots and join us in Wonderopolis today, as we trek across China to check out the greatest wall of them all.
How Long Is the Great Wall of China?