One cubic mile of seawater contains about 50 pounds of gold.
79
It takes a drop of ocean water more than 1,000 years to circulate around the world.
61
It's still possible to see the division between East and West Germany due to different light bulbs.
5
Every person in the world can fit in Texas and be given over 1000 sq ft in which to live.
14
A waterfall known as The Devil's Kettle empties water into a hole and nobody knows where it ends up!
18
A volcano has enough power to shoot ash as high as 50 km into the atmosphere.
59
Australia's Great Barrier Reef is 1,250 miles long!
45