10 of the tributaries flowing into the Amazon river are as big as the Mississippi river.
41
Europe is the only continent without a desert.
62
There are more than 50,000 earthquakes throughout the world every year!
47
The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63
Connecticut and Rhode Island never ratified the 18th Amendment (Prohibition).
25
The Sahara desert expands at about 1km per month.
90
Every year, Alaska has about 5,000 earthquakes.
31
The Niagara Falls moves upstream at an average rate of about 295ft a century!
48