A hundred years ago, the world population was 1.5 billion. Today it is more than 7 billion.
China has the most donkeys in the world, about 11 million.
Almost half the population of Hong Kong lives in an apartment that is on the 15th floor or higher.
More than 1.5 million seeds of various plants from around the world are stored at the Svalbard global seed vault in Norway. To ensure the safety of the seeds, it was built inside a tunnel carved under a mountain.
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The world biggest wedding cake weighs 15,000 pounds (6,800 kg).
