Check your map! The Pacific entrance of the Panama Canal is farther East than the Atlantic entrance.
40
If Antarctica's ice sheets melted, the worlds oceans would rise by 60 to 65 metres (200 - 210ft) - everywhere
181
The Amazon rainforest produces more than 20% the world's oxygen supply.
182
The water of the Antarctica is so cold that nothing can rot there.
334
More than a dozen men have stood on the surface of the moon, but only three have been to Challenger Deep in the Marianas Trench, the deepest known spot in the ocean.
17
Check your map! Virginia extends farther west than West Virginia.
67
The Niagara Falls moves upstream at an average rate of about 295ft a century!
48
The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63