The Sahara desert expands at about 1km per month.
90
The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63
The water between India and Sri Lanka is only 3-30 feet deep and was purportedly passable on foot until 1480 AD when a cyclone moved some sand around.
1
The average ice berg weighs 20,000,000 tons!
54
10 of the tributaries flowing into the Amazon river are as big as the Mississippi river.
41
The North Atlantic gets 2.5 centimetres (1in) wider every year.
119
Check your map! The Pacific entrance of the Panama Canal is farther East than the Atlantic entrance.
40