One cubic mile of seawater contains about 50 pounds of gold.
79
A waterfall known as The Devil's Kettle empties water into a hole and nobody knows where it ends up!
18
The North Atlantic gets 2.5 centimetres (1in) wider every year.
119
It takes a drop of ocean water more than 1,000 years to circulate around the world.
61
The Amazon rainforest produces more than 20% the world's oxygen supply.
182
Every person in the world can fit in Texas and be given over 1000 sq ft in which to live.
14
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 Dallas/Ft. Worth airport is larger than New York City's Manhattan Island.
62