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
Louisiana is the only state that grows in land area every year (Due to alluvial deposits from the Mississippi River).
41
The Amazon rainforest produces more than 20% the world's oxygen supply.
182
If Antarctica's ice sheets melted, the worlds oceans would rise by 60 to 65 metres (200 - 210ft) - everywhere
181
A volcano has enough power to shoot ash as high as 50 km into the atmosphere.
59
Even Antarctica has an area code. It's 672.
58
One cubic mile of seawater contains about 50 pounds of gold.
79