The Amazon rainforest produces more than 20% the world's oxygen supply.
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The city of Houston, Texas is built on a swamp and is slowly sinking!
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It takes a drop of ocean water more than 1,000 years to circulate around the world.
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There are approximately three chickens for every human on Earth.
13
The Niagara Falls moves upstream at an average rate of about 295ft a century!
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Venice Island was built on a foundation of tree trunks. 1200 years later, those same trunks still support almost all of central Venice.
8
Every person in the world can fit in Texas and be given over 1000 sq ft in which to live.
14
The state of Florida is bigger than England!
74