10 of the tributaries flowing into the Amazon river are as big as the Mississippi river.
41
There's a lake under Antarctica that is 25 million years old called Lake Vostok.
109
A volcano has enough power to shoot ash as high as 50 km into the atmosphere.
59
The names of the continents all end with the same letter with which they start, excluding the North and South infront of AmericA.
86
The Atlantic Ocean is saltier than the Pacific Ocean.
54
The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63