The Amazon rainforest produces more than 20% the world's oxygen supply.
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The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63
The 'King Ranch' in Texas is bigger than the state of Rhode Island.
49
The warmest temperature ever recorded on Antarctica was 3 degrees F.
175
There's a lake under Antarctica that is 25 million years old called Lake Vostok.
109
A waterfall known as The Devil's Kettle empties water into a hole and nobody knows where it ends up!
18
10 of the tributaries flowing into the Amazon river are as big as the Mississippi river.
41