10 of the tributaries flowing into the Amazon river are as big as the Mississippi river.
41
Louisiana is the only state that grows in land area every year (Due to alluvial deposits from the Mississippi River).
41
Even Antarctica has an area code. It's 672.
58
The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63
Israel's Dead Sea is 1,312 feet below sea level.
48
The Atlantic Ocean is saltier than the Pacific Ocean.
54
A volcano has enough power to shoot ash as high as 50 km into the atmosphere.
59
The Amazon rainforest produces more than 20% the world's oxygen supply.
182