The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63
If Manhattan had the same population density as Alaska, there would only be 15 people living there.
138
There are more than 50,000 earthquakes throughout the world every year!
47
The water of the Antarctica is so cold that nothing can rot there.
334
The 'King Ranch' in Texas is bigger than the state of Rhode Island.
49
Check your map! The Pacific entrance of the Panama Canal is farther East than the Atlantic entrance.
40
The Atlantic Ocean is saltier than the Pacific Ocean.
54
There's a lake under Antarctica that is 25 million years old called Lake Vostok.
109