The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63
In one day, a full grown redwood tree expels more than 2 tons of water through its leaves.
56
If Antarctica's ice sheets melted, the worlds oceans would rise by 60 to 65 metres (200 - 210ft) - everywhere
181
The warmest temperature ever recorded on Antarctica was 3 degrees F.
175
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
If Manhattan had the same population density as Alaska, there would only be 15 people living there.
138