The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63
If Antarctica's ice sheets melted, the worlds oceans would rise by 60 to 65 metres (200 - 210ft) - everywhere
181
Check your map! Virginia extends farther west than West Virginia.
67
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
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
The state with the longest coastline in the Continental U.S. is Michigan.
31