Venice Island was built on a foundation of tree trunks. 1200 years later, those same trunks still support almost all of central Venice.
8
The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63
The Amazon rainforest produces more than 20% the world's oxygen supply.
182
Europe is the only continent without a desert.
62
The Sahara desert expands at about 1km per month.
90
Israel's Dead Sea is 1,312 feet below sea level.
48
The average ice berg weighs 20,000,000 tons!
54
There's a lake under Antarctica that is 25 million years old called Lake Vostok.
109